.NET Event和Delegate

public delegate string TestDelegate(string msg, int no_one, int no_two);//我称之为协议
 
public event TestDelegate id_event;//Event实例变量
public TestDelegate id;//Delegate实例变量

/// <summary>
/// 方法样例
/// </summary>
private string implementDelegate(string msg, int no_one, int no_two)
{
    return string.Format(@"{0}:{1} * {2} = {3}", msg, no_one, no_two, no_one * no_two);
}
 
private void test()
{
    //直接附加
    id_event += implementDelegate;
    //创建委托
    id_event += new TestDelegate(implementDelegate);
    //附加匿名委托
    id_event += delegate (string msg, int no_one, int no_two)
    {
       return "Delegate Success";
    };
    //Lamda表达式附加，本质为匿名委托，写法不同
    id_event += (string msg, int no_one, int no_two) =>
    {
       return "Lamda Success";
    };
}