在C#中使用Action委托

public delegate void Action();

using System;

class Program
{
    static void Main()
    {
        Action myAction = MyMethod;
        myAction();
    }

    static void MyMethod()
    {
        Console.WriteLine("Hello, World!");
    }
}

public delegate void Action<in T1, in T2>(T1 arg1, T2 arg2);

Action<int, string> myAction = (x, y) => Console.WriteLine($"{x}: {y}");
myAction(42, "Hello, World!");