编辑代码

using System;

public class HelloWorld
{
    public static void Main()
    {
       //JSRUN引擎2.0，支持多达30种语言在线运行，全仿真在线交互输入输出。
        Console.WriteLine("HELLO world!     - cs.jsrun.net ");

        MyClass myClass = new MyClass();
        myClass.MyEvent += HandleEvent;
        myClass.TriggerEvent();
    }

   public static void HandleEvent(object sender, EventArgs e)
    {
    Console.WriteLine("Event handled");
    }
}

public class MyClass
{
    public event EventHandler MyEvent;

    public void TriggerEvent()
    {
        MyEvent?.Invoke(this, EventArgs.Empty);
    }
}