Temporary exception when compiling with specific rules in rd.xml

[CoolOppo]

Hi. Appreciate the help. I was running into a missing metadata error that said the following, when trying to deserialize xml (only came up after adding <IlcArg Include="--completetypemetadata" /> to my .csproj):

MakeGenericMethod() cannot create this generic method instantiation because the instantiation was not metadata-enabled: 'System.Xml.Serialization.ReflectionXmlSerializationReaderHelper.GetSetMemberValueDelegateWithType<MakeUltra.Rule,System.String>(System.Reflection.MemberInfo)'

So I added the following to my rd.xml file, as seen in #4775:

		<Assembly Name="System.Private.Xml">
			<Type Name="System.Xml.Serialization.ReflectionXmlSerializationReaderHelper">
				<Method Name="GetSetMemberValueDelegateWithType" Dynamic="Required All">
					<GenericArgument Name="MakeUltra.Rule,System.String" />
				</Method>
			</Type>
		</Assembly>

Now when compiling, I get the following output:

EXEC : error : [TEMPORARY EXCEPTION MESSAGE] FileLoadErrorGeneric: System.String [C:\Users\Max\Desktop\deps native\MakeUltra\MakeUltra.csproj]
  Internal.TypeSystem.TypeSystemException+FileNotFoundException: [TEMPORARY EXCEPTION MESSAGE] FileLoadErrorGeneric: System.String
     at Internal.TypeSystem.ThrowHelper.ThrowFileNotFoundException(ExceptionStringID id, String fileName)
     at ILCompiler.CompilerTypeSystemContext.GetModuleForSimpleName(String simpleName, Boolean throwIfNotFound)
     at Internal.TypeSystem.CustomAttributeTypeNameParser.GetTypeByCustomAttributeTypeName(ModuleDesc module, String name, Boolean throwIfNotFound, Func`4 resolver)
     at ILCompiler.RdXmlRootProvider.ProcessMethodDirective(IRootingServiceProvider rootProvider, ModuleDesc containingModule, TypeDesc containingType, XElement methodElement)
     at ILCompiler.RdXmlRootProvider.ProcessTypeDirective(IRootingServiceProvider rootProvider, ModuleDesc containingModule, XElement typeElement)
     at ILCompiler.RdXmlRootProvider.ProcessAssemblyDirective(IRootingServiceProvider rootProvider, XElement assemblyElement)
     at ILCompiler.RdXmlRootProvider.AddCompilationRoots(IRootingServiceProvider rootProvider)
     at ILCompiler.Compilation..ctor(DependencyAnalyzerBase`1 dependencyGraph, NodeFactory nodeFactory, IEnumerable`1 compilationRoots, ILProvider ilProvider, DebugInformationProvider debugInformationProvider, DevirtualizationManager devirtualizationManager, Logger logger)
     at ILCompiler.ILScannerBuilder.ToILScanner()
     at ILCompiler.Program.Run(String[] args)
     at ILCompiler.Program.Main(String[] args)
C:\Users\Max\.nuget\packages\microsoft.dotnet.ilcompiler\1.0.0-alpha-27229-01\build\Microsoft.NETCore.Native.targets(228,5): error MSB3073: The command ""C:\Users\Max\.nuget\packages\runtime.win-x64.microsoft.dotnet.ilcompiler\1.0.0-alpha-27229-01\tools\ilc" @"obj\Release\netcoreapp2.2\win-x64\native\MakeUltra.ilc.rsp"" exited with code 1. [C:\Users\Max\Desktop\deps native\MakeUltra\MakeUltra.csproj]

I think it must be because System.Private.Xml isn't available to me, but how do I resolve this otherwise?

I'm going to also tag #6477 and @MichalStrehovsky, seems relevant ;)

[CoolOppo]

I fixed it by switching to Newtonsoft.JSON. I originally was only using XML because I couldn't get Newtonsoft.JSON to work (same exact issue as #6394). I posted my solution there. I'm going to mark this issue as closed because I think it might be solved with a similar fix I used over there, but feel free to reopen it if you want to. I am not going to work through it though because I only used XML since I thought it would be easier than JSON.