C#--使用Lock标记临界区

在有资源争夺时，可以用Lock进行锁定对象：

 1 /*
 2   Example14_8.cs illustrates the use of the lock object
 3 */
 4 
 5 using System;
 6 using System.Threading;
 7 
 8 class Example14_8 
 9 {
10     // a shared counter
11     private int Runs = 0;
12 
13     // the CountUp method increments the shared counter
14     public  void CountUp() 
15     {
16         while (Runs < 10)
17         {
18             lock(this)
19             {
20                 int Temp = Runs;
21                 Temp++;
22                 Console.WriteLine(Thread.CurrentThread.Name + " " + Temp);
23                 Thread.Sleep(1000);
24                 Runs = Temp;
25             }
26         } 
27     }
28 
29     public static void Main() 
30     {
31         // Make an instance of this class
32         Example14_8 ex = new Example14_8();
33 
34         // And run the test outside of the static method
35         ex.RunThreads();
36     }
37 
38     public void RunThreads()
39     {
40         // create and launch two threads
41         Thread t2 = new Thread(new ThreadStart(CountUp));
42         t2.Name = "t2";
43         Thread t3 = new Thread(new ThreadStart(CountUp));
44         t3.Name = "t3";
45         t2.Start();
46         t3.Start();
47 
48     }
49 
50 }