c# singleton 的改进

public class Singleton
 {
  //private static bool instance_flag=false;instance flag 没用了,直接判断instance是否有实例就可以解决这个问题了.
  private static Singleton instance;
  public string name;
  private  Singleton()//将singleton函数变为private,防止直接调用new来创建它.
  {
   name="guqi";
   Console.WriteLine("你只可以看到我一次哦");
  }
  public static Singleton GetInstance()
  {
   if (instance==null)
   {
    
    //instance_flag=true;
    instance=new Singleton();
    return instance;
   }
   else return instance;
  }
 }

谢谢vb1980对代码的改进.

public static Singleton GetInstance()
{
if (instance==null)
{
instance=new Singleton();
}
return instance;
}
简单许多.

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