. NET Design Pattern Singleton mode (i)

1. Simple explanation: When creating an object, no matter how many times it is created, only one memory space is requested on the heap space.

2. Example:

public class singleton{  private static singletom _singleton = null;  Lock  private static Object Singleton_lock = new Object ();  Constructor privatization  Private Singleton () {      //initialization code} public  static Singleton CreateInstance () {     if (_ Singleton = = null)//First look at whether the initialization has been initialized, to avoid each entry to determine the lock     {lock        (_singleton_lock) {  //Prevent multiple threads from entering            if (_singleton = = null) {  //determine if the Singleton object is null               _singleton = new Singleton ();     }}} return _singleton;}  }

　　

　　

. NET Design Pattern Singleton mode (i)