The C# method you're calling doesn't need to return a Task object even if called through invokeMethodAsync. The static C# method I've been using, for example, simply returns a string: [JSInvokable] ...

Default interface methods are included in a new feature proposal for C# 8, which will allow developers to use the traits programming technique on the .NET platform.

You can implement fluent interfaces in C# using method chaining, factory classes, and named parameters. I’ll have more to say about fluent interfaces and method chaining in a future post here.

public static string SayHelloCS(string name) { return "Hello, " + name; } There's more to say here -- you can, for example, call non-static (instance) methods in your C# code from JavaScript and you ...

Methods in C# can be either static or non-static. A non-static method (also known as an instance method) can be invoked on an instance of the class to which it belongs.