将代表传递给事件c#

Question

阅读事件描述和msdn示例我可以看到事件订阅方式的差异.有时事件处理程序"按原样"传递,有时它们通过使用处理程序方法实例化委托来传递它们,例如

...
class Subscriber
    {
        private string id;
        public Subscriber(string ID, Publisher pub)
        {
            id = ID;
            // Subscribe to the event using C# 2.0 syntax
            pub.RaiseCustomEvent += HandleCustomEvent;
        }

        // Define what actions to take when the event is raised. 
        void HandleCustomEvent(object sender, CustomEventArgs e)
        {
            Console.WriteLine(id + " received this message: {0}", e.Message);
        }
    } 

VS

public delegate void EventHandler1(int i);
...
public class TestClass
{
    public static void Delegate1Method(int i)
    {
        System.Console.WriteLine(i);
    }

    public static void Delegate2Method(string s)
    {
        System.Console.WriteLine(s);
    }
    static void Main()
    {
        PropertyEventsSample p = new PropertyEventsSample();

        p.Event1 += new EventHandler1(TestClass.Delegate1Method);
        p.RaiseEvent1(2);
       ...
     }
}

有人可以提供清楚吗？

谢谢.

Answer 1

你的第一个代码示例是第二个的语法糖.
C#2引入了这种语法(省略了构造函数).