想使用委托函数代替Console.Readline()，下面的程序错在什么地方？
delegate string readscreen ();
static void Main(string[] args)
{
readscreen readline;
readline=new readscreen(read);
string r =Convert.ToString(readline);
Console.WriteLine("Your words are {0}", r);

}
static string read()
{
string line = Console.ReadLine();
return line;
}

[解决办法]

C# code

  string r =Convert.ToString(readline[color=#FF0000]()[/color]);
[解决办法]
  string r =Convert.ToString(readline());
[解决办法]
delegate string readscreen();
       static void Main(string[] args)
       {
           readscreen readline;
           readline = new readscreen(read);
           string r = Convert.ToString(readline());            Console.WriteLine("Your words are {0}", r);
           Console.Read();
       }
       static string read()
       {
           string line = Console.ReadLine();
           return line;
       }
[解决办法]
根据你的意义，应该没有问题：

delegate string ReadEventHandler();

 static void Main(string[] args)
 {
    ReadEventHandler readline=new ReadEventHandler();
    Console.WriteLine(readline);
 }

 static string Read()
 {
    string line = Console.ReadLine();
    return line;
 }

以上代码返回：工程名称.Programe+ReadEventHandler;
[解决办法]
  
上面纠正下：ReadEventHandler readline=new ReadEventHandler(Read);

或者如下写：
static void Main(string[] args)
{
  ReadEventHandler readline=delegate()
  {
   string line = Console.ReadLine();
    return line;
  };
}
OR
static void Main(string[] args)
{
  ReadEventHandler readline=new ReadEventHandler(()=>
  {
   string line = Console.ReadLine();
    return line;
  });
}
[解决办法]
delegate string readscreen ();

这个委托的使用方法，
readscreen read=new readscreen(target);

调用方法： read();或read.invoke();


[解决办法]


C# code
        /// <summary>        /// 保存缓存        /// </summary>        /// <param name="key">键</param>        /// <param name="value">值</param>        public void SaveCache(object key, object value)        {            SaveCacheHandler handler = new SaveCacheHandler(SaveCacheInvoke);            IAsyncResult ar = handler.BeginInvoke(key, value, new AsyncCallback(SaveCacheCallBack), null);        }        private void SaveCacheInvoke(object key, object value)        {            lock (hashtable.SyncRoot)            {                hashtable[key] = value;            }        }        private void SaveCacheCallBack(IAsyncResult ar)        {            SaveCacheHandler handler = (SaveCacheHandler)((AsyncResult)ar).AsyncDelegate;            handler.EndInvoke(ar);        }