[sinhpham]

"C calls into you" means you already have a C code base and now need to call your C# functions.

[Const-me]

Right, C# is OK when C code calls into it.

https://stackoverflow.com/a/5235549/126995

[int_19h]

One neat trick with .NET on Windows, is that you can actually export static methods in assemblies as unmanaged entry points. In other words, things can LoadLibrary/GetProcAddress them, and invoke them as native.

C# doesn't support this out of the box, but it can be easily done by post-processing the generated assembly. There's a NuGet package for that.

https://www.nuget.org/packages/UnmanagedExports

I'm not sure if any of that works on other platforms, or with .NET Core. Probably not.

[Const-me]

I once tried to use that trick, for nVidia optimus integration.

Didn’t work because that recompilation step broke debugger, and invalidated .PDB debug symbols.

[steveklabnik]

To be clear, I’m not saying it’s not possible. I’m saying that one less runtime is an advantage.