泛型类/泛型委托示例

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Windows.Forms;

namespace DeletegateT
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MyClass<string, string> _MyClass = new MyClass<string, string>();//实例化泛型类MyClass            
            _MyClass._MyDelegate = new MyDelegate<string, string>(DemoMethod);//实例化_MyClass的泛型委托
            MessageBox.Show(_MyClass.GetValues("Jimmy's Book","Jimmy"));//此时编译器已经能确定参数的类型为String，进而通过委托调用泛型方法DemoMethod

            
            _MyClass._MyEvent += new MyEvent<string, string>(DemoEvent<string, string>);//给_MyClass订阅一个事件
            _MyClass.InvokeEvent("Jimmy", "China");//激发事件
        }


        //定义有返回值的委托 
        public delegate string MyDelegate<T, S>(T title, S author);

        //定义事件委托。
        public delegate void MyEvent<E, P>(E Name, P Address);

        public class MyClass<V, F>
        {
            //声明委托
            public MyDelegate<V, F> _MyDelegate;
            //声明事件委托
            public event MyEvent<V, F> _MyEvent = null;

            public string GetValues(V title, F author)
            {
                //调用委托
                return _MyDelegate(title, author);
            }

            public MyClass()
            {
            }

            public void InvokeEvent(V name, F address)
            {
                if (_MyEvent != null)
                {
                    //调用委托
                    _MyEvent(name, address);
                }
            }
        }


        public string DemoMethod<T, S>(T title, S author)
        {
            return title.ToString() + " ，Author：" + author;
        }

        private void DemoEvent<V, F>(V name, F address)
        {
           MessageBox.Show(name + " come from " + address);
        }