Action<T> 和 Func<T> 委托

 1 using System;
 2 
 3 namespace SimpleDelegates_Demo {
 4     delegate double Operate(double input);
 5     class Program {
 6         static void Main(string[] args) {
 7             Func<double, double>[] actions = {MathOperations.Square, MathOperations.MultiplyByTwo };
 8             //遍历每个委托实例.
 9             foreach (Func<double, double> action in actions) {
10                 ProcessAndDisplayResult(action, 2);
11                 ProcessAndDisplayResult(action, 2.5);
12                 ProcessAndDisplayResult(action, 5.2);                
13                 Console.WriteLine();
14             }
15         }
16 
17         static void ProcessAndDisplayResult(Func<double, double> action, double inputVal) {
18             Console.WriteLine("Input is [{0}],Result is [{1}]", inputVal, action(inputVal));
19         }
20     }
21 }