C# 泛型方法

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace ConsoleApplication1
 7 {
 8     class Program
 9     {
10         static void Main(string[] args)
11         {
12             
13             //传入int类型OK
14             int a, b;
15             a = 2;
16             b = 3;
17             swap<int>(ref a, ref b);
18             Console.WriteLine("a(2):" + a + ",b(3):" + b);
19             Console.ReadKey();
20             
21             //传入string类型OK
22             /*
23             string a, b;
24             a = "a";
25             b = "b";
26             swap<string>(ref a, ref b);
27             Console.WriteLine("a(a):" + a + ",b(b):" + b);
28             Console.ReadKey();
29              */
30             /*
31             string a;
32             int b;//b定义为int,第34行报错。
33             a = "a";
34             b = 3;
35             swap<string>(ref a, ref b);
36             Console.WriteLine("a(a):" + a + ",b(b):" + b);
37             Console.ReadKey();
38              */
39 
40         }
41         static void swap<T>(ref T a, ref T b)
42         {
43             T temp = a;
44             a = b;
45             b = temp;
46         }
47     }
48 }