What Dotnet native directives to use for AsyncAwaitBestPractices.MVVM? - xamarin.forms

Question

I'm using AsyncAwaitBestPractices.MVVM's IAsyncCommand and AsyncCommand in my Xamarin.Forms app. The UWP version of the app is compiled with .NET Native tool chain. When I do SomeAsyncCommand.RaiseCanExecuteChanged(), I get an exception:
System.Reflection.MissingMetadataException: 'This operation cannot be carried out because metadata for the following object was removed for performance reasons:\n\n EETypeRva:0x000976A0\n\nNo further information is available. Rebuild in debug mode for better information.\n\n'
Note that this was a debug build. When I added a local copy of the library, I was able to find the line that triggers the exception:
static bool IsLightweightMethod(this MethodBase method)
{
var typeInfoRTDynamicMethod = typeof(DynamicMethod).GetTypeInfo().GetDeclaredNestedType("RTDynamicMethod");
return ...
}
The exception is triggered by GetDeclaredNestedType("RTDynamicMethod"). So the binaries do include the metadata of DynamicMethod, but not that of it's child type RTDynamicMethod. They have been removed because of .NET Native tool chain.
Now, I read that you can whitelist classes / namespaces / assemblies in project properties -> Default.rd.xml. But I can't seem to get the right element to whitelist the nested class. Here's what I tried:
<Assembly Name="System.Private.CoreLib" Dynamic="Required All" />
<Namespace Name="System.Reflection.Emit" Dynamic="Required All" />
<Type Name="System.Reflection.Emit.DynamicMethod">
<Type Name="RTDynamicMethod" Dynamic="Required All"/>
</Type>
Here System.Private.CoreLib is the assembly of DynamicMethod, System.Reflection.Emit is the namespace of DynamicMethod and RTDynamicMethod. As far as I understand, either of the three should work, yet none of them do. Edit: the type one gives me a warning: Default.rd.xml(35): warning : ILTransform : warning ILT0027: Type 'System.Reflection.Emit.DynamicMethod' could not be found.
I also tried variations using Type Name="System.Reflection.Emit.DynamicMethod+RTDynamicMethod", using <Library>, with or without namespaces in type, etc.

Answer 1

At first, you can try to use the following code in the Default.rd.xml:
<Type Name="System.Reflection.Emit.DynamicMethod" Dynamic="Required All">
<Type Name="System.Reflection.Emit.RTDynamicMethod" Dynamic="Required All">
For more information, you can check the similar case and the issue on the github.
In addition, why did you add the tag .net 6.0? I have checked the package named System.Reflection.Emit, the last update time is 12/4/2019 and it does't support the .net 6.0.