This is a seemingly successful attempt to switch from .NET Core 3.1 to .NET 5.0. As a first advantage, this allows accessing the Windows 10 Runtime from a VST, which isn't possible under .NET Core.
Although I will not merge this directly, thank you for the contribution. I used it as a check list when I did the changes myself.
I really need to understand what each change is and also fixed some other stuff.
This is a seemingly successful attempt to switch from .NET Core 3.1 to .NET 5.0. As a first advantage, this allows accessing the Windows 10 Runtime from a VST, which isn't possible under .NET Core.