Understanding of Thread.Join() usage

The understanding of the usage of Thread.Join()

  means that when a thread calls the join method of another thread, it means that the thread is blocked until the other thread terminates and then executes   . For
  example  

, 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}

There are three threads processing ( Including the main thread), you can see the execution result.
Result:
This is Main.1
This is F2.1
This is F1.1
This is Main.2

If: Comment // x.Join();
result:
This is Main .1
This is Main.2
This is F2.1
This is F1.1

In addition: you can look at the difference between the following methods. Interested friends can use the above example to test

Thread.Suspend(): Suspend the thread, or if the thread has been suspended, it will not work;
Thread.Resume( ): Continue the suspended thread;
Thread.Interrupt(): Abort the thread in the Wait or Sleep or Join thread state;
Thread.Sleep(): Block the current thread for the specified number of milliseconds;