P/Invoke source generation - .NET

.NET 7 introduces a source generator for P/Invokes that recognizes the LibraryImportAttribute in C# code. When it's not using source generation, the built-in interop system in the .NET runtime generates an IL stub—a stream of IL instructions that is JIT-ed—at run time to facilitate the transition from managed to unmanaged. The following code shows defining and then calling a P/Invoke that uses thi