设计模式-单例模式

public class SingletonClass

     {

         public SingletonClass()

         {

         }

     }

public static class SingletonInstance

     {

         private static SingletonClass m_SingletonInstance = null;

         public static SingletonClass SingletonInstance

         {
　　　　　　
    　　    get{

              if(m_SingletonInstance==null)

              {

                   m_SingletonInstance=new SingletonClass();

              }

              return m_SingletonInstance;

              }

         }

     }