委托

委托理解起来就想c++ 函数指针

我的理解为 : 方法的快捷方式

    delegate int AddNumDelegate(int n);
    class Program
    {
        static void Main(string[] args)
        {
            AddNumDelegate addndlgt = new AddNumDelegate(Mydelegate.AddNum);
            Console.WriteLine(addndlgt(15));
            Console.ReadLine();
        }
    }
    class Mydelegate
    {
        public static int num = 10;
        public static int AddNum(int p)
        {
            num += p;
            return num;
        }
    }

 multicasting delegate 多路委托

delegate int AddNumDelegate(int n);
class Program
{
static void Main(string[] args)
{
AddNumDelegate addndlgt = new AddNumDelegate(Mydelegate.AddNum);
Console.WriteLine(addndlgt(15));
AddNumDelegate addndlgt2 = new AddNumDelegate(Mydelegate.RemoveNum);
Console.WriteLine(addndlgt2(15));
//Mydelegate.num = 0;
AddNumDelegate addndlgtALL = addndlgt + addndlgt2;
Console.WriteLine(addndlgtALL(15));
Console.ReadLine();
}
}
class Mydelegate
{
public static int num = 10;
public static int AddNum(int p)
{
num += p;
return num;
}
public static int RemoveNum(int p)
{
num -= p;
return num;
}
}