Resolved TypeLoadException by adding dedicated builds for dotnet SDK 6.0 and 7.0

[Darth-Jurassic]

No description provided.

[Darth-Jurassic]

1.0.16 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
1.1.13 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
2.0.9 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
2.1.18 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
2.2.7 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
3.0.3 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
3.1.4 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
3.1.32 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
5.0.17 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
7.0.0 at [C:\Users\appveyor\AppData\Local\Microsoft\dotnet\shared\Microsoft.NETCore.App]

Installing .NET SDK 6.0 on AppVeyor will fix the build

[martincostello]

Thanks for contributing - if this hasn't already been resolved as #2775, then please open a new pull request that addresses this using multi-targeting, rather than creating new projects with suffixes.