https://learn.microsoft.com/en-us/dotnet/api/system.invalidprogramexception?view=netframework-4.8.1&redirectedfrom=MSDN
InvalidProgramException Class (System) | Microsoft Learn
The exception that is thrown when a program contains invalid Microsoft intermediate language (MSIL) or metadata. Generally this indicates a bug in the compiler...
class systemmicrosoftlearn
https://discussions.unity.com/t/invalidprogramexception-invalid-il-code-in-system-runtime-remoting-channels-ipc-ipcclientchannel-get_channelname-il_0000-ret/177330
InvalidProgramException: Invalid IL code in...
Nov 22, 2016 - This happens when try to do something with remoting. In a test environment everything works fine. I think I use exactly the same unity-version of remoting...
invalidilcode