Revert "Move ServiceCollection to abstractions (#52284)"

src/libraries/Microsoft.Extensions.DependencyInjection.Abstractions/ref/Microsoft.Extensions.DependencyInjection.Abstractions.cs

@@ -49,23 +49,6 @@ public partial interface ISupportRequiredService
         object GetRequiredService(System.Type serviceType);
     }
     public delegate object ObjectFactory(System.IServiceProvider serviceProvider, object?[]? arguments);
-    public partial class ServiceCollection : Microsoft.Extensions.DependencyInjection.IServiceCollection, System.Collections.Generic.ICollection<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>, System.Collections.Generic.IEnumerable<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>, System.Collections.Generic.IList<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>, System.Collections.IEnumerable
-    {
-        public ServiceCollection() { }
-        public int Count { get { throw null; } }
-        public bool IsReadOnly { get { throw null; } }
-        public Microsoft.Extensions.DependencyInjection.ServiceDescriptor this[int index] { get { throw null; } set { } }
-        public void Clear() { }
-        public bool Contains(Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { throw null; }
-        public void CopyTo(Microsoft.Extensions.DependencyInjection.ServiceDescriptor[] array, int arrayIndex) { }
-        public System.Collections.Generic.IEnumerator<Microsoft.Extensions.DependencyInjection.ServiceDescriptor> GetEnumerator() { throw null; }
-        public int IndexOf(Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { throw null; }
-        public void Insert(int index, Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { }
-        public bool Remove(Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { throw null; }
-        public void RemoveAt(int index) { }
-        void System.Collections.Generic.ICollection<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>.Add(Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { }
-        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
-    }
     public static partial class ServiceCollectionServiceExtensions
     {
         public static Microsoft.Extensions.DependencyInjection.IServiceCollection AddScoped(this Microsoft.Extensions.DependencyInjection.IServiceCollection services, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicConstructors)] System.Type serviceType) { throw null; }

src/libraries/Microsoft.Extensions.DependencyInjection/ref/Microsoft.Extensions.DependencyInjection.cs

@@ -13,6 +13,23 @@ public DefaultServiceProviderFactory(Microsoft.Extensions.DependencyInjection.Se
         public Microsoft.Extensions.DependencyInjection.IServiceCollection CreateBuilder(Microsoft.Extensions.DependencyInjection.IServiceCollection services) { throw null; }
         public System.IServiceProvider CreateServiceProvider(Microsoft.Extensions.DependencyInjection.IServiceCollection containerBuilder) { throw null; }
     }
+    public partial class ServiceCollection : Microsoft.Extensions.DependencyInjection.IServiceCollection, System.Collections.Generic.ICollection<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>, System.Collections.Generic.IEnumerable<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>, System.Collections.Generic.IList<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>, System.Collections.IEnumerable
+    {
+        public ServiceCollection() { }
+        public int Count { get { throw null; } }
+        public bool IsReadOnly { get { throw null; } }
+        public Microsoft.Extensions.DependencyInjection.ServiceDescriptor this[int index] { get { throw null; } set { } }
+        public void Clear() { }
+        public bool Contains(Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { throw null; }
+        public void CopyTo(Microsoft.Extensions.DependencyInjection.ServiceDescriptor[] array, int arrayIndex) { }
+        public System.Collections.Generic.IEnumerator<Microsoft.Extensions.DependencyInjection.ServiceDescriptor> GetEnumerator() { throw null; }
+        public int IndexOf(Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { throw null; }
+        public void Insert(int index, Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { }
+        public bool Remove(Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { throw null; }
+        public void RemoveAt(int index) { }
+        void System.Collections.Generic.ICollection<Microsoft.Extensions.DependencyInjection.ServiceDescriptor>.Add(Microsoft.Extensions.DependencyInjection.ServiceDescriptor item) { }
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
+    }
     public static partial class ServiceCollectionContainerBuilderExtensions
     {
         public static Microsoft.Extensions.DependencyInjection.ServiceProvider BuildServiceProvider(this Microsoft.Extensions.DependencyInjection.IServiceCollection services) { throw null; }

src/libraries/Microsoft.Extensions.DependencyInjection/ref/Microsoft.Extensions.DependencyInjection.csproj

@@ -4,7 +4,6 @@
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Microsoft.Extensions.DependencyInjection.cs" />
-    <Compile Include="Microsoft.Extensions.DependencyInjection.Forwards.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.DependencyInjection.Abstractions\ref\Microsoft.Extensions.DependencyInjection.Abstractions.csproj" />