Atomic operations on the C # thread base

Using the System.Threading.Interlocked class can improve thread security, specific reference msdn:http://msdn.microsoft.com/zh-cn/library/ System.threading.interlocked.aspx in general, it is unsafe to access global variables in a child thread in such a manner as i++. Test the following code, after 100 times in the Test1 Number++,number does not change from 0 to 100 each time, and test2 is no problem.

01.using System;
02.
03.using System.Windows.Forms;
04.
05.namespace WindowsApplication32
06.
07.{
08.
public partial class Form1:form
10.
11. {
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Public Form1 ()
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15. {
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InitializeComponent ();
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19.}
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int number = 0;
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///<summary>
26.
27.///Ordinary variable access mode
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///</summary>
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private void Test1 ()
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33. {
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for (int m = 0; m < m++)
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37. {
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number++;
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System.Threading.Thread.Sleep (100);
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43.}
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Console.WriteLine (number);
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47.}
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private void Button1_Click (object sender, EventArgs e)
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51. {
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Number = 0;
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for (int i = 0; i < i++)
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57. {
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New System.Threading.Thread (test1). Start ();
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61.}
32K
63.}
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///<summary>
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67.///use of atomic access mode
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///</summary>
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private void Test2 ()
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73. {
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for (int m = 0 M < m++)
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77. {
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System.Threading.Interlocked.Increment (ref number);
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Bayi. System.Threading.Thread.Sleep (100);
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83.}
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Console.WriteLine (number);
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87.}
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The private void button2_click (object sender, EventArgs e)
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91. {
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Number = 0;
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for (int i = 0; i < i++)
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97. {
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New System.Threading.Thread (TEST2). Start ();
100.
101.}
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103.}
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105.}
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107.}