### Description In P/Invoke callbacks, Enums are not considered blittable. This means no enums can be used as parameters of P/Invoke callbacks. ### Reproduction Steps Attempt to compile a method like ```cs [UnmanagedCallersOnly] public static void M(StringComparison myEnum) { } ``` using Emscripten / WASM AOT ### Expected behavior The above code should be possible. Enums should be considered blittable. ### Actual behavior An error is shown, enums are not considered blittable. ### Regression? _No response_ ### Known Workarounds Use the underlying type of the enum (usually int) instead and manually cast. ### Configuration Tested in .NET 6 RC2 ### Other information _No response_