c# 委托初用法

   public delegate void Print(string printStr);
         public static void DelegateMethod(string printStr)
         {
             Console.WriteLine(printStr.Reverse().ToArray());
         }

         static string ReverseString(string s)
         {
             return new string(s.Reverse().ToArray());
         }
         static void Main(string[] args)
         {
             //旧方法
             Print print = DelegateMethod;
             print("a string");

             //新方法
             Func<string, string> rev = ReverseString;
             Console.WriteLine(rev("a string"));
             //原始方法
             Console.WriteLine(ReverseString("a string"));

             Console.ReadKey(true);
         }