Add basic implementation of the ComWrappers

src/coreclr/nativeaot/Directory.Build.props

@@ -54,6 +54,10 @@
   <PropertyGroup>
     <DefineConstants Condition="'$(FeatureCominterop)' == 'true'">FEATURE_COMINTEROP;$(DefineConstants)</DefineConstants>
   </PropertyGroup>
+  <PropertyGroup>
+    <FeatureComWrappers>false</FeatureComWrappers>
+    <FeatureComWrappers Condition="'$(TargetsWindows)' == 'true'">true</FeatureComWrappers>
+  </PropertyGroup>
 
   <!-- Platform specific properties -->
   <PropertyGroup Condition="'$(Platform)' == 'x64'">

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Runtime/CompilerHelpers/InteropHelpers.cs

@@ -405,14 +405,20 @@ public static T GetCurrentCalleeDelegate<T>() where T : class // constraint can'
             return PInvokeMarshal.GetCurrentCalleeDelegate<T>();
         }
 
-        public static IntPtr ConvertManagedComInterfaceToNative(object pUnk)
+        public static IntPtr ConvertManagedComInterfaceToNative(object pUnk, Guid interfaceGuid)
         {
             if (pUnk == null)
             {
                 return IntPtr.Zero;
             }
 
+#if TARGET_WINDOWS
+#pragma warning disable CA1416
+            return ComWrappers.ComInterfaceForObject(pUnk, interfaceGuid);
+#pragma warning restore CA1416
+#else
             throw new PlatformNotSupportedException(SR.PlatformNotSupported_ComInterop);
+#endif
         }
 
         public static object ConvertNativeComInterfaceToManaged(IntPtr pUnk)

src/coreclr/nativeaot/System.Private.CoreLib/src/Resources/Strings.resx

@@ -3103,7 +3103,13 @@
   <data name="Argv_IncludeDoubleQuote" xml:space="preserve">
     <value>The argv[0] argument cannot include a double quote.</value>
   </data>
+  <data name="InvalidOperation_ResetGlobalComWrappersInstance" xml:space="preserve">
+    <value>Attempt to update previously set global instance.</value>
+  </data>
   <data name="ResourceManager_ReflectionNotAllowed" xml:space="preserve">
     <value>Use of ResourceManager for custom types is disabled. Set the MSBuild Property CustomResourceTypesSupport to true in order to enable it.</value>
   </data>
+  <data name="InvalidOperation_ComInteropRequireComWrapperInstance" xml:space="preserve">
+    <value>COM Interop requires ComWrapper instance registered for marshalling.</value>
+  </data>
 </root>

src/coreclr/nativeaot/System.Private.CoreLib/src/System.Private.CoreLib.csproj

@@ -202,6 +202,7 @@
     <Compile Include="System\Runtime\TypeLoaderExports.cs" />
     <Compile Include="System\Runtime\InitializeFinalizerThread.cs" />
     <Compile Include="System\Runtime\InteropServices\ComEventsHelper.CoreRT.cs" Condition="'$(FeatureCominterop)' == 'true'" />
+    <Compile Include="System\Runtime\InteropServices\ComWrappers.CoreRT.cs" Condition="'$(FeatureComWrappers)' == 'true'" />
     <Compile Include="System\Runtime\InteropServices\GCHandle.CoreRT.cs" />
     <Compile Include="System\Runtime\InteropServices\InteropExtensions.cs" />
     <Compile Include="System\Runtime\InteropServices\NativeFunctionPointerWrapper.cs" />