Thread.Join()用法的理解

指在一線程裡面調用另一線程join方法時，表示將本線程阻塞直至另一線程終止時再執行  
  比如  

 1using System;
 2
 3namespace TestThreadJoin
 4{
 5    class Program
 6    {
 7        static void Main()
 8        {
 9            System.Threading.Thread x = new System.Threading.Thread(new System.Threading.ThreadStart(f1));
10            x.Start();
11            Console.WriteLine("This is Main.{0}", 1);
12            x.Join();
13            Console.WriteLine("This is Main.{0}", 2);
14            Console.ReadLine();
15        }
16        static void f1()
17        {
18            System.Threading.Thread y = new System.Threading.Thread(new System.Threading.ThreadStart(f2));
19            y.Start();
20            y.Join();
21            Console.WriteLine("This is F1.{0}",1);
22        }
23
24        static void f2()
25        {
26            Console.WriteLine("This is F2.{0}", 1);
27        }
28    }
29}
這兒有三個線程在處理(包括主線程),大家可看看執行結果.
結果:
This is Main.1
This is F2.1
This is F1.1
This is Main.2

如果: 注釋//  x.Join();
結果:
This is Main.1
This is Main.2
This is F2.1
This is F1.1