diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/Base/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/Base/StructDeclarationTest.cs
index 46318f5d..eb5a0dd0 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/Base/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/Base/StructDeclarationTest.cs
@@ -206,6 +206,9 @@ public abstract class StructDeclarationTest : PInvokeGeneratorTest
     [Test]
     public Task WithAccessSpecifierTest() => WithAccessSpecifierTestImpl();
 
+    [Test]
+    public Task WithPackingTest() => WithPackingTestImpl();
+
     [Test]
     public Task SourceLocationAttributeTest() => SourceLocationAttributeTestImpl();
 
@@ -279,5 +282,7 @@ public abstract class StructDeclarationTest : PInvokeGeneratorTest
 
     protected abstract Task WithAccessSpecifierTestImpl();
 
+    protected abstract Task WithPackingTestImpl();
+
     protected abstract Task SourceLocationAttributeTestImpl();
 }
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleUnix/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleUnix/StructDeclarationTest.cs
index db712217..602a295a 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleUnix/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleUnix/StructDeclarationTest.cs
@@ -1724,6 +1724,50 @@ public partial struct MyStruct3
         return ValidateGeneratedCSharpCompatibleUnixBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"using System;
+using System.Runtime.InteropServices;
+
+namespace ClangSharp.Test
+{
+    [StructLayout(LayoutKind.Sequential, Pack = CustomPackValue)]
+    public partial struct MyStruct
+    {
+        [NativeTypeName(""size_t[1]"")]
+        public _FixedBuffer_e__FixedBuffer FixedBuffer;
+
+        public partial struct _FixedBuffer_e__FixedBuffer
+        {
+            public UIntPtr e0;
+
+            public unsafe ref UIntPtr this[int index]
+            {
+                get
+                {
+                    fixed (UIntPtr* pThis = &e0)
+                    {
+                        return ref pThis[index];
+                    }
+                }
+            }
+        }
+    }
+}
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedCSharpCompatibleUnixBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleWindows/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleWindows/StructDeclarationTest.cs
index 285e1e53..e5fdaa52 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleWindows/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleWindows/StructDeclarationTest.cs
@@ -1728,6 +1728,50 @@ public partial struct MyStruct3
         return ValidateGeneratedCSharpCompatibleWindowsBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"using System;
+using System.Runtime.InteropServices;
+
+namespace ClangSharp.Test
+{
+    [StructLayout(LayoutKind.Sequential, Pack = CustomPackValue)]
+    public partial struct MyStruct
+    {
+        [NativeTypeName(""size_t[1]"")]
+        public _FixedBuffer_e__FixedBuffer FixedBuffer;
+
+        public partial struct _FixedBuffer_e__FixedBuffer
+        {
+            public UIntPtr e0;
+
+            public unsafe ref UIntPtr this[int index]
+            {
+                get
+                {
+                    fixed (UIntPtr* pThis = &e0)
+                    {
+                        return ref pThis[index];
+                    }
+                }
+            }
+        }
+    }
+}
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedCSharpCompatibleWindowsBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestUnix/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestUnix/StructDeclarationTest.cs
index ffdee379..fde9bf5f 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestUnix/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestUnix/StructDeclarationTest.cs
@@ -1702,6 +1702,49 @@ public partial struct MyStruct3
         return ValidateGeneratedCSharpLatestUnixBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"using System;
+using System.Runtime.InteropServices;
+
+namespace ClangSharp.Test
+{
+    [StructLayout(LayoutKind.Sequential, Pack = CustomPackValue)]
+    public partial struct MyStruct
+    {
+        [NativeTypeName(""size_t[1]"")]
+        public _FixedBuffer_e__FixedBuffer FixedBuffer;
+
+        public partial struct _FixedBuffer_e__FixedBuffer
+        {
+            public nuint e0;
+
+            public ref nuint this[int index]
+            {
+                get
+                {
+                    return ref AsSpan(int.MaxValue)[index];
+                }
+            }
+
+            public Span<nuint> AsSpan(int length) => MemoryMarshal.CreateSpan(ref e0, length);
+        }
+    }
+}
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedCSharpLatestUnixBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestWindows/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestWindows/StructDeclarationTest.cs
index 337ca60a..1c7b1948 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestWindows/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestWindows/StructDeclarationTest.cs
@@ -1706,6 +1706,49 @@ public partial struct MyStruct3
         return ValidateGeneratedCSharpLatestWindowsBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"using System;
+using System.Runtime.InteropServices;
+
+namespace ClangSharp.Test
+{
+    [StructLayout(LayoutKind.Sequential, Pack = CustomPackValue)]
+    public partial struct MyStruct
+    {
+        [NativeTypeName(""size_t[1]"")]
+        public _FixedBuffer_e__FixedBuffer FixedBuffer;
+
+        public partial struct _FixedBuffer_e__FixedBuffer
+        {
+            public nuint e0;
+
+            public ref nuint this[int index]
+            {
+                get
+                {
+                    return ref AsSpan(int.MaxValue)[index];
+                }
+            }
+
+            public Span<nuint> AsSpan(int length) => MemoryMarshal.CreateSpan(ref e0, length);
+        }
+    }
+}
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedCSharpLatestWindowsBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewUnix/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewUnix/StructDeclarationTest.cs
index b3038461..067b2237 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewUnix/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewUnix/StructDeclarationTest.cs
@@ -1728,6 +1728,52 @@ public partial struct MyStruct3
         return ValidateGeneratedCSharpPreviewUnixBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.InteropServices;
+
+namespace ClangSharp.Test
+{
+    [StructLayout(LayoutKind.Sequential, Pack = CustomPackValue)]
+    public partial struct MyStruct
+    {
+        [NativeTypeName(""size_t[1]"")]
+        public _FixedBuffer_e__FixedBuffer FixedBuffer;
+
+        public partial struct _FixedBuffer_e__FixedBuffer
+        {
+            public nuint e0;
+
+            [UnscopedRef]
+            public ref nuint this[int index]
+            {
+                get
+                {
+                    return ref AsSpan(int.MaxValue)[index];
+                }
+            }
+
+            [UnscopedRef]
+            public Span<nuint> AsSpan(int length) => MemoryMarshal.CreateSpan(ref e0, length);
+        }
+    }
+}
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedCSharpPreviewUnixBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewWindows/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewWindows/StructDeclarationTest.cs
index 5d568d8f..bf2fc373 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewWindows/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewWindows/StructDeclarationTest.cs
@@ -1732,6 +1732,52 @@ public partial struct MyStruct3
         return ValidateGeneratedCSharpPreviewWindowsBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.InteropServices;
+
+namespace ClangSharp.Test
+{
+    [StructLayout(LayoutKind.Sequential, Pack = CustomPackValue)]
+    public partial struct MyStruct
+    {
+        [NativeTypeName(""size_t[1]"")]
+        public _FixedBuffer_e__FixedBuffer FixedBuffer;
+
+        public partial struct _FixedBuffer_e__FixedBuffer
+        {
+            public nuint e0;
+
+            [UnscopedRef]
+            public ref nuint this[int index]
+            {
+                get
+                {
+                    return ref AsSpan(int.MaxValue)[index];
+                }
+            }
+
+            [UnscopedRef]
+            public Span<nuint> AsSpan(int length) => MemoryMarshal.CreateSpan(ref e0, length);
+        }
+    }
+}
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedCSharpPreviewWindowsBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/PInvokeGeneratorTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/PInvokeGeneratorTest.cs
index a85ec5c4..9ccabb9f 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/PInvokeGeneratorTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/PInvokeGeneratorTest.cs
@@ -38,43 +38,43 @@ public abstract class PInvokeGeneratorTest
 
     protected static string EscapeXml(string value) => new XText(value).ToString();
 
-    protected static Task ValidateGeneratedCSharpPreviewWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GeneratePreviewCode | PInvokeGeneratorConfigurationOptions.None | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedCSharpPreviewWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GeneratePreviewCode | PInvokeGeneratorConfigurationOptions.None | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedCSharpPreviewUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GeneratePreviewCode | PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedCSharpPreviewUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GeneratePreviewCode | PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedCSharpLatestWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.None | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedCSharpLatestWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.None | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedCSharpLatestUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedCSharpLatestUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedCSharpCompatibleWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GenerateCompatibleCode | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedCSharpCompatibleWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GenerateCompatibleCode | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedCSharpCompatibleUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GenerateCompatibleCode | PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedCSharpCompatibleUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.CSharp, PInvokeGeneratorConfigurationOptions.GenerateCompatibleCode | PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedXmlPreviewWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null, [CallerFilePath] string filePath = "")
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GeneratePreviewCode | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs, filePath);
+    protected static Task ValidateGeneratedXmlPreviewWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null, [CallerFilePath] string filePath = "")
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GeneratePreviewCode | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs, filePath);
 
-    protected static Task ValidateGeneratedXmlPreviewUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GeneratePreviewCode | PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedXmlPreviewUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GeneratePreviewCode | PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedXmlLatestWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null, [CallerFilePath] string filePath = "")
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.None | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs, filePath);
+    protected static Task ValidateGeneratedXmlLatestWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null, [CallerFilePath] string filePath = "")
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.None | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs, filePath);
 
-    protected static Task ValidateGeneratedXmlLatestUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedXmlLatestUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedXmlCompatibleWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GenerateCompatibleCode | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedXmlCompatibleWindowsBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GenerateCompatibleCode | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    protected static Task ValidateGeneratedXmlCompatibleUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
-        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GenerateCompatibleCode | PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, expectedDiagnostics, libraryPath, commandlineArgs);
+    protected static Task ValidateGeneratedXmlCompatibleUnixBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorConfigurationOptions additionalConfigOptions = PInvokeGeneratorConfigurationOptions.None, string[]? excludedNames = null, IReadOnlyDictionary<string, string>? remappedNames = null, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes = null, IReadOnlyDictionary<string, string>? withCallConvs = null, IReadOnlyDictionary<string, string>? withClasses = null, IReadOnlyDictionary<string, string>? withLibraryPaths = null, IReadOnlyDictionary<string, string>? withNamespaces = null, string[]? withSetLastErrors = null, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs = null, IReadOnlyDictionary<string, string>? withTypes = null, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings = null, IReadOnlyDictionary<string, string>? withPackings = null, IEnumerable<Diagnostic>? expectedDiagnostics = null, string libraryPath = DefaultLibraryPath, string[]? commandlineArgs = null)
+        => ValidateGeneratedBindingsAsync(inputContents, expectedOutputContents, PInvokeGeneratorOutputMode.Xml, PInvokeGeneratorConfigurationOptions.GenerateCompatibleCode | PInvokeGeneratorConfigurationOptions.GenerateUnixTypes | additionalConfigOptions, excludedNames, remappedNames, withAccessSpecifiers, withAttributes, withCallConvs, withClasses, withLibraryPaths, withNamespaces, withSetLastErrors, withTransparentStructs, withTypes, withUsings, withPackings, expectedDiagnostics, libraryPath, commandlineArgs);
 
-    private static async Task ValidateGeneratedBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorOutputMode outputMode, PInvokeGeneratorConfigurationOptions configOptions, string[]? excludedNames, IReadOnlyDictionary<string, string>? remappedNames, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes, IReadOnlyDictionary<string, string>? withCallConvs, IReadOnlyDictionary<string, string>? withClasses, IReadOnlyDictionary<string, string>? withLibraryPaths, IReadOnlyDictionary<string, string>? withNamespaces, string[]? withSetLastErrors, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs, IReadOnlyDictionary<string, string>? withTypes, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings, IEnumerable<Diagnostic>? expectedDiagnostics, string libraryPath, string[]? commandlineArgs, [CallerFilePath] string filePath = "")
+    private static async Task ValidateGeneratedBindingsAsync(string inputContents, string expectedOutputContents, PInvokeGeneratorOutputMode outputMode, PInvokeGeneratorConfigurationOptions configOptions, string[]? excludedNames, IReadOnlyDictionary<string, string>? remappedNames, IReadOnlyDictionary<string, AccessSpecifier>? withAccessSpecifiers, IReadOnlyDictionary<string, IReadOnlyList<string>>? withAttributes, IReadOnlyDictionary<string, string>? withCallConvs, IReadOnlyDictionary<string, string>? withClasses, IReadOnlyDictionary<string, string>? withLibraryPaths, IReadOnlyDictionary<string, string>? withNamespaces, string[]? withSetLastErrors, IReadOnlyDictionary<string, (string, PInvokeGeneratorTransparentStructKind)>? withTransparentStructs, IReadOnlyDictionary<string, string>? withTypes, IReadOnlyDictionary<string, IReadOnlyList<string>>? withUsings, IReadOnlyDictionary<string, string>? withPackings, IEnumerable<Diagnostic>? expectedDiagnostics, string libraryPath, string[]? commandlineArgs, [CallerFilePath] string filePath = "")
     {
         Assert.True(File.Exists(DefaultInputFileName));
         commandlineArgs ??= DefaultCppClangCommandLineArgs;
@@ -106,7 +106,7 @@ private static async Task ValidateGeneratedBindingsAsync(string inputContents, s
             WithTransparentStructs = withTransparentStructs,
             WithTypes = withTypes,
             WithUsings = withUsings,
-            WithPackings = null,
+            WithPackings = withPackings,
         };
 
         using (var pinvokeGenerator = new PInvokeGenerator(config, (path) => outputStream))
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlCompatibleUnix/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlCompatibleUnix/StructDeclarationTest.cs
index d0b2bc6a..2338d380 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlCompatibleUnix/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlCompatibleUnix/StructDeclarationTest.cs
@@ -1725,6 +1725,49 @@ struct MyStruct3
         return ValidateGeneratedXmlCompatibleUnixBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes"" ?>
+<bindings>
+  <namespace name=""ClangSharp.Test"">
+    <struct name=""MyStruct"" access=""public"" layout=""Sequential"" pack=""CustomPackValue"">
+      <field name=""FixedBuffer"" access=""public"">
+        <type native=""size_t[1]"" count=""1"" fixed=""_FixedBuffer_e__FixedBuffer"">UIntPtr</type>
+      </field>
+      <struct name=""_FixedBuffer_e__FixedBuffer"" access=""public"">
+        <field name=""e0"" access=""public"">
+          <type>UIntPtr</type>
+        </field>
+        <indexer access=""public"" unsafe=""true"">
+          <type>ref UIntPtr</type>
+          <param name=""index"">
+            <type>int</type>
+          </param>
+          <get>
+            <code>fixed (UIntPtr* pThis = &amp;e0)
+    {
+        return ref pThis[index];
+    }</code>
+          </get>
+        </indexer>
+      </struct>
+    </struct>
+  </namespace>
+</bindings>
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedXmlCompatibleUnixBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlCompatibleWindows/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlCompatibleWindows/StructDeclarationTest.cs
index c05bca08..c29a9497 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlCompatibleWindows/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlCompatibleWindows/StructDeclarationTest.cs
@@ -1730,6 +1730,49 @@ struct MyStruct3
         return ValidateGeneratedXmlCompatibleWindowsBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes"" ?>
+<bindings>
+  <namespace name=""ClangSharp.Test"">
+    <struct name=""MyStruct"" access=""public"" layout=""Sequential"" pack=""CustomPackValue"">
+      <field name=""FixedBuffer"" access=""public"">
+        <type native=""size_t[1]"" count=""1"" fixed=""_FixedBuffer_e__FixedBuffer"">UIntPtr</type>
+      </field>
+      <struct name=""_FixedBuffer_e__FixedBuffer"" access=""public"">
+        <field name=""e0"" access=""public"">
+          <type>UIntPtr</type>
+        </field>
+        <indexer access=""public"" unsafe=""true"">
+          <type>ref UIntPtr</type>
+          <param name=""index"">
+            <type>int</type>
+          </param>
+          <get>
+            <code>fixed (UIntPtr* pThis = &amp;e0)
+    {
+        return ref pThis[index];
+    }</code>
+          </get>
+        </indexer>
+      </struct>
+    </struct>
+  </namespace>
+</bindings>
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedXmlCompatibleWindowsBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlLatestUnix/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlLatestUnix/StructDeclarationTest.cs
index 91b5cbf3..6778c6a6 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlLatestUnix/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlLatestUnix/StructDeclarationTest.cs
@@ -1705,6 +1705,53 @@ struct MyStruct3
         return ValidateGeneratedXmlLatestUnixBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes"" ?>
+<bindings>
+  <namespace name=""ClangSharp.Test"">
+    <struct name=""MyStruct"" access=""public"" layout=""Sequential"" pack=""CustomPackValue"">
+      <field name=""FixedBuffer"" access=""public"">
+        <type native=""size_t[1]"" count=""1"" fixed=""_FixedBuffer_e__FixedBuffer"">nuint</type>
+      </field>
+      <struct name=""_FixedBuffer_e__FixedBuffer"" access=""public"">
+        <field name=""e0"" access=""public"">
+          <type>nuint</type>
+        </field>
+        <indexer access=""public"">
+          <type>ref nuint</type>
+          <param name=""index"">
+            <type>int</type>
+          </param>
+          <get>
+            <code>return ref AsSpan(int.MaxValue)[index];</code>
+          </get>
+        </indexer>
+        <function name=""AsSpan"" access=""public"">
+          <type>Span&lt;nuint&gt;</type>
+          <param name=""length"">
+            <type>int</type>
+          </param>
+          <code>MemoryMarshal.CreateSpan(ref e0, length);</code>
+        </function>
+      </struct>
+    </struct>
+  </namespace>
+</bindings>
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedXmlLatestUnixBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlLatestWindows/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlLatestWindows/StructDeclarationTest.cs
index 18f28897..205e1ed0 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlLatestWindows/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlLatestWindows/StructDeclarationTest.cs
@@ -1711,6 +1711,53 @@ struct MyStruct3
         return ValidateGeneratedXmlLatestWindowsBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes"" ?>
+<bindings>
+  <namespace name=""ClangSharp.Test"">
+    <struct name=""MyStruct"" access=""public"" layout=""Sequential"" pack=""CustomPackValue"">
+      <field name=""FixedBuffer"" access=""public"">
+        <type native=""size_t[1]"" count=""1"" fixed=""_FixedBuffer_e__FixedBuffer"">nuint</type>
+      </field>
+      <struct name=""_FixedBuffer_e__FixedBuffer"" access=""public"">
+        <field name=""e0"" access=""public"">
+          <type>nuint</type>
+        </field>
+        <indexer access=""public"">
+          <type>ref nuint</type>
+          <param name=""index"">
+            <type>int</type>
+          </param>
+          <get>
+            <code>return ref AsSpan(int.MaxValue)[index];</code>
+          </get>
+        </indexer>
+        <function name=""AsSpan"" access=""public"">
+          <type>Span&lt;nuint&gt;</type>
+          <param name=""length"">
+            <type>int</type>
+          </param>
+          <code>MemoryMarshal.CreateSpan(ref e0, length);</code>
+        </function>
+      </struct>
+    </struct>
+  </namespace>
+</bindings>
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedXmlLatestWindowsBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlPreviewUnix/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlPreviewUnix/StructDeclarationTest.cs
index 511a68e3..e5e77598 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlPreviewUnix/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlPreviewUnix/StructDeclarationTest.cs
@@ -1705,6 +1705,53 @@ struct MyStruct3
         return ValidateGeneratedXmlPreviewUnixBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes"" ?>
+<bindings>
+  <namespace name=""ClangSharp.Test"">
+    <struct name=""MyStruct"" access=""public"" layout=""Sequential"" pack=""CustomPackValue"">
+      <field name=""FixedBuffer"" access=""public"">
+        <type native=""size_t[1]"" count=""1"" fixed=""_FixedBuffer_e__FixedBuffer"">nuint</type>
+      </field>
+      <struct name=""_FixedBuffer_e__FixedBuffer"" access=""public"">
+        <field name=""e0"" access=""public"">
+          <type>nuint</type>
+        </field>
+        <indexer access=""public"">
+          <type>ref nuint</type>
+          <param name=""index"">
+            <type>int</type>
+          </param>
+          <get>
+            <code>return ref AsSpan(int.MaxValue)[index];</code>
+          </get>
+        </indexer>
+        <function name=""AsSpan"" access=""public"">
+          <type>Span&lt;nuint&gt;</type>
+          <param name=""length"">
+            <type>int</type>
+          </param>
+          <code>MemoryMarshal.CreateSpan(ref e0, length);</code>
+        </function>
+      </struct>
+    </struct>
+  </namespace>
+</bindings>
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedXmlPreviewUnixBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlPreviewWindows/StructDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlPreviewWindows/StructDeclarationTest.cs
index 6cad4903..e51ecb81 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlPreviewWindows/StructDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/XmlPreviewWindows/StructDeclarationTest.cs
@@ -1711,6 +1711,53 @@ struct MyStruct3
         return ValidateGeneratedXmlPreviewWindowsBindingsAsync(inputContents, expectedOutputContents, withAccessSpecifiers: withAccessSpecifiers);
     }
 
+    protected override Task WithPackingTestImpl()
+    {
+        const string InputContents = @"struct MyStruct
+{
+    size_t FixedBuffer[1];
+};
+";
+
+        const string ExpectedOutputContents = @"<?xml version=""1.0"" encoding=""UTF-8"" standalone=""yes"" ?>
+<bindings>
+  <namespace name=""ClangSharp.Test"">
+    <struct name=""MyStruct"" access=""public"" layout=""Sequential"" pack=""CustomPackValue"">
+      <field name=""FixedBuffer"" access=""public"">
+        <type native=""size_t[1]"" count=""1"" fixed=""_FixedBuffer_e__FixedBuffer"">nuint</type>
+      </field>
+      <struct name=""_FixedBuffer_e__FixedBuffer"" access=""public"">
+        <field name=""e0"" access=""public"">
+          <type>nuint</type>
+        </field>
+        <indexer access=""public"">
+          <type>ref nuint</type>
+          <param name=""index"">
+            <type>int</type>
+          </param>
+          <get>
+            <code>return ref AsSpan(int.MaxValue)[index];</code>
+          </get>
+        </indexer>
+        <function name=""AsSpan"" access=""public"">
+          <type>Span&lt;nuint&gt;</type>
+          <param name=""length"">
+            <type>int</type>
+          </param>
+          <code>MemoryMarshal.CreateSpan(ref e0, length);</code>
+        </function>
+      </struct>
+    </struct>
+  </namespace>
+</bindings>
+";
+
+        var withPackings = new Dictionary<string, string> {
+            ["MyStruct"] = "CustomPackValue"
+        };
+        return ValidateGeneratedXmlPreviewWindowsBindingsAsync(InputContents, ExpectedOutputContents, withPackings: withPackings);
+    }
+
     protected override Task SourceLocationAttributeTestImpl()
     {
         const string InputContents = @"struct MyStruct