OK, Solved the problem. Was using the DLL from .net5.0\ref. Changed to using the DLL from .net5.0 folder. Thanks for the help.
How to fix System.BadImageFormatException
I have a project with a method that uses a DLL from another project. It used to work just fine, but now when I try to execute that method, I get the exception:
System.BadImageFormatException: 'Could not load file or assembly 'MyLibrary, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Reference assemblies should not be loaded for execution. They can only be loaded in the Reflection-only loader context. (0x80131058)'
The project file looks like this:
<Project Sdk="Microsft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<LangVersion>9.0</LangVersion>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<Reference Include="MyLibrary">
<HintPath>....\MyLibrary\MyLibrary\obj\Debug\net5.0\ref\MyLibrary.dll</HintPath>
</Reference>
</ItemGroup>
</Project>
How do I fix this problem?