帮助理解委托、匿名委托、Lambda表达式还有事件

写了一个小程序，能够很好的认识到这三个的用法

namespace Lambda
{
    /// <summary>
    /// 实现根据指定运算形式 输出结果
    /// </summary>
    class Program
    {
        delegate int TwoInt32OperationDel(int paramA, int paramB);
        static void Operation(TwoInt32OperationDel del)
        {
            for (int i = 0; i < 4; i++)
            {
                for (int y = 0; y < 4; y++)
                {
                    int result = del(i, y);
                    Console.Write("{0}and{1}={2} ",i,y,result);                
                }
                Console.WriteLine();
            }
        }
        private static int twoInt32Plus(int a, int b)
        {
            return a + b;
        }
        private static int twoInt32Multi(int a, int b)
        {
            return a * b;
        }
        static void Main(string[] args)
        {
            ////1 匿名委托方法调用：(匿名方法只是简化了一下代理的写法)
           // Console.WriteLine("A+B");
           // Operation(delegate(int a, int b) {return a + b; });
           // Console.WriteLine("A*B");
           // Operation(delegate(int a, int b) { return a * b; });
           // Console.Read();

            //2 代理
            Console.WriteLine("A+B");
            TwoInt32OperationDel t = new TwoInt32OperationDel(twoInt32Plus);
            TwoInt32OperationDel t2 = new TwoInt32OperationDel(twoInt32Multi);
            Operation(t);
            Console.WriteLine("A*B");
            Operation(t2);
            Console.Read();


            ////3 Lambda方法调用
            //Console.WriteLine("A+B");
            //Operation((a, b) => { return a + b; });
            //Console.WriteLine("A*B");
            //Operation((a, b) => { return a * b; });
            //Console.Read();
        }
    }
}

 事件的使用：

       public delegate int plusDelegate(int a,int b);
       public event plusDelegate pl;
        public int plus(int a, int b)
        {
            return a + b;
        }
        private void button7_Click(object sender, EventArgs e)
        {
            pl += plus;
            textBox3.Text = pl(3, 4).ToString();
        }

委托的使用：

 public delegate int plusDelegate(int a,int b);
        public int plus(int a, int b)
        {
            return a + b;
        }
        
        private void button7_Click(object sender, EventArgs e)
        {
            plusDelegate p = new plusDelegate(plus);//方法1 
            plusDelegate p = (int a, int b) => { return a + b; };//方法2        
            plusDelegate p = delegate(int a, int b) { return (a + b); };//方法3

            textBox3.Text = p(3, 4).ToString();
        }