c# 委托初用法

 1   public delegate void Print(string printStr);
 2         public static void DelegateMethod(string printStr)
 3         {
 4             Console.WriteLine(printStr.Reverse().ToArray());
 5         }
 6 
 7         static string ReverseString(string s)
 8         {
 9             return new string(s.Reverse().ToArray());
10         }
11         static void Main(string[] args)
12         {
13             //旧方法 
14             Print print = DelegateMethod;
15             print("a string");
16 
17             //新方法 
18             Func<string, string> rev = ReverseString;
19             Console.WriteLine(rev("a string"));
20             //原始方法 
21             Console.WriteLine(ReverseString("a string"));
22 
23             Console.ReadKey(true);
24         }