C#多线程Singleton(单件)模式模板

private static volatile T _instance = null; 
private static object objLock = new Object(); 
private T() 
{ 
} 
public static T Instance 
{ 
get 
{ 
if (_instance == null) 
{ 
lock (objLock) 
{ 
if (_instance == null) 
{ 
_instance = new T(); 
} 
} 
} 
return _instance; 
} 
} 
 
在必要的时候需如果要刷新当前instance，可以这样写： 
 代码如下:

public static void RefreshInstance() 
{ 
_instance = new T(); 
}