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           1. Lock(object) ¶ÔÐèҪͬ²½µÄ´úÂë¿é¼ÓËø£»
¡¡¡¡¡¡¡¡2. Monitor Class
¡¡¡¡¡¡¡¡3. ReaderWriterLock Class¡¡¡¡¡¡
           4. Mutex Class
           5. Semaphore
           6. Event
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private string lockFlag = "LOCK";
        public void GoWC(Person p)
        {
            lock (lockFlag)
            {
                Console.WriteLine("Begin");
                  Console.WriteLine("End");
            }
        }
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace ConsoleApplication1
{
class Program
{
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function loginNull()
{
if (document.form1.txtName.value =="")
{
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WebForm1.show("Óû§Ãû´íÎó,²»ÄÜΪ¿Õ").value;
//alert("ÇëÌîдÄúµÄÓû§Ãû£¡");
document.form1.txtName.focus();
return false;
}
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