diff --git a/src/Microsoft.ML.Core/ComponentModel/ComponentCatalog.cs b/src/Microsoft.ML.Core/ComponentModel/ComponentCatalog.cs
index 25b7b9d3a7..04c20b9c31 100644
--- a/src/Microsoft.ML.Core/ComponentModel/ComponentCatalog.cs
+++ b/src/Microsoft.ML.Core/ComponentModel/ComponentCatalog.cs
@@ -336,29 +336,29 @@ private static bool ShouldSkipPath(string path)
             string name = Path.GetFileName(path).ToLowerInvariant();
             switch (name)
             {
-            case "cqo.dll":
-            case "fasttreenative.dll":
-            case "libiomp5md.dll":
-            case "libvw.dll":
-            case "matrixinterf.dll":
-            case "Microsoft.ML.neuralnetworks.gpucuda.dll":
-            case "MklImports.dll":
-            case "microsoft.research.controls.decisiontrees.dll":
-            case "Microsoft.ML.neuralnetworks.sse.dll":
-            case "neuraltreeevaluator.dll":
-            case "optimizationbuilderdotnet.dll":
-            case "parallelcommunicator.dll":
-            case "Microsoft.ML.Runtime.RunTests.dll":
-            case "scopecompiler.dll":
-            case "tbb.dll":
-            case "Internallearnscope.dll":
-            case "unmanagedlib.dll":
-            case "vcclient.dll":
-            case "libxgboost.dll":
-            case "zedgraph.dll":
-            case "__scopecodegen__.dll":
-            case "cosmosClientApi.dll":
-                return true;
+                case "cqo.dll":
+                case "fasttreenative.dll":
+                case "libiomp5md.dll":
+                case "libvw.dll":
+                case "matrixinterf.dll":
+                case "Microsoft.ML.neuralnetworks.gpucuda.dll":
+                case "MklImports.dll":
+                case "microsoft.research.controls.decisiontrees.dll":
+                case "Microsoft.ML.neuralnetworks.sse.dll":
+                case "neuraltreeevaluator.dll":
+                case "optimizationbuilderdotnet.dll":
+                case "parallelcommunicator.dll":
+                case "Microsoft.ML.Runtime.RunTests.dll":
+                case "scopecompiler.dll":
+                case "tbb.dll":
+                case "Internallearnscope.dll":
+                case "unmanagedlib.dll":
+                case "vcclient.dll":
+                case "libxgboost.dll":
+                case "zedgraph.dll":
+                case "__scopecodegen__.dll":
+                case "cosmosClientApi.dll":
+                    return true;
             }
 
             foreach (var s in FilePrefixesToAvoid)
@@ -567,14 +567,14 @@ private static MethodInfo FindInstanceGetter(Type instType, Type loaderType)
 
         private static MethodInfo FindCreateMethod(Type instType, Type loaderType, Type[] parmTypes)
         {
-            var meth = loaderType.GetMethod("Create", parmTypes ?? Type.EmptyTypes);
+            var meth = loaderType.GetMethod("Create", BindingFlags.Public | BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy, null, parmTypes ?? Type.EmptyTypes, null);
             if (meth == null)
                 return null;
             if (meth.DeclaringType != loaderType)
                 return null;
             if (meth.ReturnType != instType)
                 return null;
-            if (!meth.IsPublic || !meth.IsStatic)
+            if (!meth.IsStatic)
                 return null;
             return meth;
         }
diff --git a/src/Microsoft.ML.Data/Transforms/CopyColumnsTransform.cs b/src/Microsoft.ML.Data/Transforms/CopyColumnsTransform.cs
index 63debdc710..478d509c24 100644
--- a/src/Microsoft.ML.Data/Transforms/CopyColumnsTransform.cs
+++ b/src/Microsoft.ML.Data/Transforms/CopyColumnsTransform.cs
@@ -129,7 +129,8 @@ public sealed class Arguments : TransformInputBase
             public Column[] Column;
         }
 
-        public static IDataView Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        // Factory method for SignatureLoadDataTransform.
+        private static IDataView Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
         {
             Contracts.CheckValue(env, nameof(env));
             env.CheckValue(ctx, nameof(ctx));
@@ -139,7 +140,8 @@ public static IDataView Create(IHostEnvironment env, ModelLoadContext ctx, IData
             return transformer.Transform(input);
         }
 
-        public static CopyColumnsTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        // Factory method for SignatureLoadModel.
+        private static CopyColumnsTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             env.CheckValue(ctx, nameof(ctx));
@@ -225,7 +227,8 @@ private static VersionInfo GetVersionInfo()
                 loaderSignature: LoaderSignature);
         }
 
-        public static CopyColumnsRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema schema)
+        // Factory method for SignatureLoadRowMapper.
+        private static CopyColumnsRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema schema)
         {
             Contracts.CheckValue(env, nameof(env));
             env.CheckValue(ctx, nameof(ctx));
diff --git a/src/Microsoft.ML.Data/Transforms/KeyToValueTransform.cs b/src/Microsoft.ML.Data/Transforms/KeyToValueTransform.cs
index fd51d650fb..de8463a804 100644
--- a/src/Microsoft.ML.Data/Transforms/KeyToValueTransform.cs
+++ b/src/Microsoft.ML.Data/Transforms/KeyToValueTransform.cs
@@ -112,7 +112,7 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
         /// <summary>
         /// Factory method for SignatureLoadModel.
         /// </summary>
-        public static KeyToValueTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        private static KeyToValueTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             var host = env.Register(nameof(KeyToValueTransform));
@@ -129,13 +129,13 @@ private KeyToValueTransform(IHost host, ModelLoadContext ctx)
         /// <summary>
         /// Factory method for SignatureLoadDataTransform.
         /// </summary>
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         /// <summary>
         /// Factory method for SignatureLoadRowMapper.
         /// </summary>
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         public override void Save(ModelSaveContext ctx)
diff --git a/src/Microsoft.ML.Data/Transforms/KeyToVectorTransform.cs b/src/Microsoft.ML.Data/Transforms/KeyToVectorTransform.cs
index efa519e05e..70afe195b0 100644
--- a/src/Microsoft.ML.Data/Transforms/KeyToVectorTransform.cs
+++ b/src/Microsoft.ML.Data/Transforms/KeyToVectorTransform.cs
@@ -163,7 +163,7 @@ public override void Save(ModelSaveContext ctx)
         }
 
         // Factory method for SignatureLoadModel.
-        public static KeyToVectorTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        private static KeyToVectorTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             var host = env.Register(RegistrationName);
@@ -204,7 +204,7 @@ public static IDataTransform Create(IHostEnvironment env, IDataView input, param
              new KeyToVectorTransform(env, columns).MakeDataTransform(input);
 
         // Factory method for SignatureDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, Arguments args, IDataView input)
         {
             Contracts.CheckValue(env, nameof(env));
             env.CheckValue(args, nameof(args));
@@ -227,11 +227,11 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
         }
 
         // Factory method for SignatureLoadDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         protected override IRowMapper MakeRowMapper(ISchema schema) => new Mapper(this, schema);
diff --git a/src/Microsoft.ML.Data/Transforms/Normalizer.cs b/src/Microsoft.ML.Data/Transforms/Normalizer.cs
index b757d2e7f8..8f7c25166b 100644
--- a/src/Microsoft.ML.Data/Transforms/Normalizer.cs
+++ b/src/Microsoft.ML.Data/Transforms/Normalizer.cs
@@ -405,7 +405,7 @@ public static NormalizerTransformer Create(IHostEnvironment env, ModelLoadContex
         }
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         public override void Save(ModelSaveContext ctx)
diff --git a/src/Microsoft.ML.Data/Transforms/TermTransform.cs b/src/Microsoft.ML.Data/Transforms/TermTransform.cs
index 348c3b6e5a..eac79f41bf 100644
--- a/src/Microsoft.ML.Data/Transforms/TermTransform.cs
+++ b/src/Microsoft.ML.Data/Transforms/TermTransform.cs
@@ -330,7 +330,7 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
         }
 
         // Factory method for SignatureLoadModel.
-        public static TermTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        private static TermTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             var host = env.Register(RegistrationName);
@@ -385,11 +385,11 @@ private TermTransform(IHost host, ModelLoadContext ctx)
         }
 
         // Factory method for SignatureLoadDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         /// <summary>
diff --git a/src/Microsoft.ML.ImageAnalytics/ImageGrayscaleTransform.cs b/src/Microsoft.ML.ImageAnalytics/ImageGrayscaleTransform.cs
index 0f944c517d..5744fe384d 100644
--- a/src/Microsoft.ML.ImageAnalytics/ImageGrayscaleTransform.cs
+++ b/src/Microsoft.ML.ImageAnalytics/ImageGrayscaleTransform.cs
@@ -98,7 +98,8 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
                 .MakeDataTransform(input);
         }
 
-        public static ImageGrayscaleTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        // Factory method for SignatureLoadModel.
+        private static ImageGrayscaleTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             var host = env.Register(RegistrationName);
@@ -113,11 +114,11 @@ private ImageGrayscaleTransform(IHost host, ModelLoadContext ctx)
         }
 
         // Factory method for SignatureLoadDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         public override void Save(ModelSaveContext ctx)
diff --git a/src/Microsoft.ML.ImageAnalytics/ImageLoaderTransform.cs b/src/Microsoft.ML.ImageAnalytics/ImageLoaderTransform.cs
index fc5965c7a5..b012d59d34 100644
--- a/src/Microsoft.ML.ImageAnalytics/ImageLoaderTransform.cs
+++ b/src/Microsoft.ML.ImageAnalytics/ImageLoaderTransform.cs
@@ -84,7 +84,8 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
                 .MakeDataTransform(data);
         }
 
-        public static ImageLoaderTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        // Factory method for SignatureLoadModel.
+        private static ImageLoaderTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             env.CheckValue(ctx, nameof(ctx));
@@ -104,11 +105,11 @@ private ImageLoaderTransform(IHost host, ModelLoadContext ctx)
         }
 
         // Factory method for SignatureLoadDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         protected override void CheckInputColumn(ISchema inputSchema, int col, int srcCol)
diff --git a/src/Microsoft.ML.ImageAnalytics/ImagePixelExtractorTransform.cs b/src/Microsoft.ML.ImageAnalytics/ImagePixelExtractorTransform.cs
index fd340c2e46..1e563fbc2c 100644
--- a/src/Microsoft.ML.ImageAnalytics/ImagePixelExtractorTransform.cs
+++ b/src/Microsoft.ML.ImageAnalytics/ImagePixelExtractorTransform.cs
@@ -344,7 +344,8 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
             return new RowToRowMapperTransform(env, input, transformer.MakeRowMapper(input.Schema));
         }
 
-        public static ImagePixelExtractorTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        // Factory method for SignatureLoadModel.
+        private static ImagePixelExtractorTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             var host = env.Register(RegistrationName);
@@ -369,11 +370,11 @@ private ImagePixelExtractorTransform(IHost host, ModelLoadContext ctx)
         }
 
         // Factory method for SignatureLoadDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         public override void Save(ModelSaveContext ctx)
diff --git a/src/Microsoft.ML.ImageAnalytics/ImageResizerTransform.cs b/src/Microsoft.ML.ImageAnalytics/ImageResizerTransform.cs
index feb79140f8..1755430cf3 100644
--- a/src/Microsoft.ML.ImageAnalytics/ImageResizerTransform.cs
+++ b/src/Microsoft.ML.ImageAnalytics/ImageResizerTransform.cs
@@ -206,7 +206,8 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
             return new ImageResizerTransform(env, cols).MakeDataTransform(input);
         }
 
-        public static ImageResizerTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        // Factory method for SignatureLoadModel.
+        private static ImageResizerTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             var host = env.Register(RegistrationName);
@@ -245,11 +246,11 @@ private ImageResizerTransform(IHost host, ModelLoadContext ctx)
         }
 
         // Factory method for SignatureLoadDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         public override void Save(ModelSaveContext ctx)
@@ -295,7 +296,7 @@ private sealed class Mapper : MapperBase
             private readonly ImageResizerTransform _parent;
 
             public Mapper(ImageResizerTransform parent, ISchema inputSchema)
-                :base(parent.Host.Register(nameof(Mapper)), parent, inputSchema)
+                : base(parent.Host.Register(nameof(Mapper)), parent, inputSchema)
             {
                 _parent = parent;
             }
diff --git a/src/Microsoft.ML.TensorFlow/TensorflowTransform.cs b/src/Microsoft.ML.TensorFlow/TensorflowTransform.cs
index b3522254f9..578a9d5778 100644
--- a/src/Microsoft.ML.TensorFlow/TensorflowTransform.cs
+++ b/src/Microsoft.ML.TensorFlow/TensorflowTransform.cs
@@ -106,7 +106,7 @@ public static IDataTransform Create(IHostEnvironment env, IDataView input, strin
         }
 
         // Factory method for SignatureLoadModel.
-        public static TensorFlowTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        private static TensorFlowTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             env.CheckValue(ctx, nameof(ctx));
@@ -142,7 +142,7 @@ public static TensorFlowTransform Create(IHostEnvironment env, ModelLoadContext
         }
 
         // Factory method for SignatureDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, Arguments args, IDataView input)
         {
             Contracts.CheckValue(env, nameof(env));
             env.CheckValue(args, nameof(args));
@@ -153,11 +153,11 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
         }
 
         // Factory method for SignatureLoadDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         private TFSession LoadTFSession(byte[] modelBytes)
diff --git a/src/Microsoft.ML.Transforms/KeyToBinaryVectorTransform.cs b/src/Microsoft.ML.Transforms/KeyToBinaryVectorTransform.cs
index 52a49b1563..ab33f5761f 100644
--- a/src/Microsoft.ML.Transforms/KeyToBinaryVectorTransform.cs
+++ b/src/Microsoft.ML.Transforms/KeyToBinaryVectorTransform.cs
@@ -107,7 +107,7 @@ public override void Save(ModelSaveContext ctx)
         }
 
         // Factory method for SignatureLoadModel.
-        public static KeyToBinaryVectorTransform Create(IHostEnvironment env, ModelLoadContext ctx)
+        private static KeyToBinaryVectorTransform Create(IHostEnvironment env, ModelLoadContext ctx)
         {
             Contracts.CheckValue(env, nameof(env));
             var host = env.Register(RegistrationName);
@@ -150,11 +150,11 @@ public static IDataTransform Create(IHostEnvironment env, Arguments args, IDataV
         }
 
         // Factory method for SignatureLoadDataTransform.
-        public static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
+        private static IDataTransform Create(IHostEnvironment env, ModelLoadContext ctx, IDataView input)
             => Create(env, ctx).MakeDataTransform(input);
 
         // Factory method for SignatureLoadRowMapper.
-        public static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
+        private static IRowMapper Create(IHostEnvironment env, ModelLoadContext ctx, ISchema inputSchema)
             => Create(env, ctx).MakeRowMapper(inputSchema);
 
         protected override IRowMapper MakeRowMapper(ISchema schema) => new Mapper(this, schema);