静态方法和实例方法对于委托的区别

class Program {
    static void Main(string[] args) {
        X x = new X();
        ProgressReporter p = x.InstanceProgress;
        p(1);
        Console.WriteLine(p.Target == x); // True
        Console.WriteLine(p.Method); // Void InstanceProgress(Int32)    }
    static void WriteProgressToConsole(int percentComplete) {
        Console.WriteLine(percentComplete+"%");
    }
    static void WriteProgressToFile(int percentComplete) {
        System.IO.File.AppendAllText("progress.txt", percentComplete + "%");
    }
}
class X {
    public void InstanceProgress(int percentComplete) {
        // do something    }
}