.NET 11 Preview 7 Unexpectedly Throws `TypeLoadException`

[JasonBock]

Description

I originally reported this here as I found it loading types from DotNext.Threading. However, it seems like this may really be an issue with .NET 11 Preview 7.

Reproduction Steps

To recreate:

• Create a console app with the following settings (note: this should be run with .NET 11 Preview 7)
  • <LangVersion>preview</LangVersion>
  • <TargetFramework>net11.0</TargetFramework>
• Reference the DotNext.Threading NuGet package, version 6.6.5
• Add this to Program.cs:
  • _ = typeof(DotNext.Threading.AsyncAutoResetEvent).Assembly.GetTypes();

Expected behavior

I would expect this to return the types in the assembly

Actual behavior

What I get is a TypeLoadException:

System.TypeLoadException: Method 'get_Task' in type 'DotNext.Threading.Tasks.<TaskSchedulerExtensions_T>FEC23FF8E24C5C893F2B0DCE3A3DBD6B033A895D525ABEAE11C935B5879FC7CF4__ImmediateTask`2' from assembly 'DotNext.Threading, Version=6.6.1.0, Culture=neutral, PublicKeyToken=c8827b44e18fe572' does not have an implementation.
System.TypeLoadException: Method 'get_Task' in type 'DotNext.Threading.Tasks.<TaskSchedulerExtensions_T>FEC23FF8E24C5C893F2B0DCE3A3DBD6B033A895D525ABEAE11C935B5879FC7CF4__DelayedTaskStateMachine`2' from assembly 'DotNext.Threading, Version=6.6.1.0, Culture=neutral, PublicKeyToken=c8827b44e18fe572' does not have an implementation.

Regression?

Maybe. If I change TargetFramework to net10.0, it runs fine with no issues.

Known Workarounds

No response

Configuration

No response

Other information

No response

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[EgorBo]

Likely changed by #125900 cc @VSadov