using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

public static class BlahYada_Test

{

    public static void DoSomething<TResult>(this Func<TResult> func)

    { }

​

    public static void Blah()

    {

        var yada = Yada;

        yada.DoSomething(); // <-- Works

    }

​

    public static string Yada()

    {

        return "Hello";

    }

}