using System;
using System.Collections.Generic;
using System.Text;
namespace DelegateTest2
{
    public delegate void tranDelegate(string test);
    class Program
    {
        //類之間值的傳遞，可用於子窗體向父窗體回傳數值
        static void Main(string[] args)
        {
            ParentClass parent = new ParentClass();
            ChildClass child = new ChildClass(parent._myDele);
            //父窗體給子窗體傳值簡單
            child.Result = parent.Test;
            Console.WriteLine("從父窗體得來的值:{0}", child.Result);
            //子窗體給父窗體回傳
            child.sendValue();
            Console.WriteLine("從子窗體得來的值:{0}", parent.Result);
            Console.ReadLine();
        }
    }
    class ParentClass
    {
        private string _test = "parent";
        private static string _result = "";
        public tranDelegate _myDele = delegate(string test)
        {
            _result = test;
        };
        public string Result
        {
            set { _result = value; }
            get { return _result; }
        }
        public string Test
        {
            set { this._test = value; }
            get { return this._test; }
        }
      
    }
    class ChildClass
    {
        private string _test = "child";
        private string _result = "";
        private tranDelegate _tranDele;
        public ChildClass(tranDelegate tranDele)
        {
            _tranDele = tranDele;
        }
        public string Test
        {
            get { return _test; }
            set { _test = value; }
        }
        public string Result
        {
            set { this._result = value; }
            get { return this._result; }
        }
        public void sendValue()
        {
            if (_tranDele != null)
            {
                _tranDele(this._test);
            }
        }
    }
}
模擬了Windows應用程序時用的子窗體使用委托給父窗體回傳值，當然給子窗體寫的事件更好。