C# 语言特性系列(1) 委托 - 协变和逆变

public delegate void MyEventHandler ();

public event MyEventHandler MyEvent;

MyEvent += Raise();

MyEventHandler myHandler = obj.method;// instance or static method

A deleage is a type that reference a method.

class Love

{

}

class Bad: Love

{

}

class Main

{

public static Love 1Handler()

{

return null;

}

public static Bad 2Handler()

{

return null;

}

public delegate Love Handler();

static void Main()

{

Handler handler1 = 1Handler;

Handler handler2 = 2Handler;

}