C#單例模式的三種寫法
阿新 • • 發佈：2017-06-13
lock help static gin -a ont singleton pub ria
_instance = new Singleton();
}
}
return _instance;
}
}
第三種
第一種……
public class Singleton
{
private static Singleton _instance = null;
private Singleton(){}
public static Singleton CreateInstance()
{
if(_instance == null)
{
_instance = new Singleton();
}
return _instance;
}
}
另外一種
public class Singleton
{
private volatile static Singleton _instance = null;
private static readonly object lockHelper = new object();
private Singleton(){}
public static Singleton CreateInstance()
{
if(_instance == null)
{
lock(lockHelper)
{
_instance = new Singleton();
}
}
return _instance;
}
}
第三種
public class Singleton
{
private Singleton(){}
public static readonly Singleton instance = new Singleton();
}
C#單例模式的三種寫法