c#简单的实现单例模式，或单体模式

 

s

abstract public class DefaultSingletonNode<TNode> where TNode : DefaultSingletonNode<TNode>, new() { private static object lockHelper = new object(); public static TNode GetInstance() { TNode _instance = null; if (_instance == null) { lock (lockHelper) { if (_instance == null) { _instance = new TNode(); } } } return _instance; } }

　　

abstract public class SingleBLL<T> : DefaultNode<T> where T : DefaultNode<T>, new(){ }

　　

public class logBLL : SingleBLL<logBLL> { public void Write(string s){} }

　　

调用

logBLL.GetInstance().Write("sdfsfdsf");

 

 

优点，对于类型的实例化具有一定的可控性，不需要一直去new，

转载于:https://www.cnblogs.com/ijunxiong/articles/7274382.html