Singleton design mode (single instance)

Using system;using system.collections.generic;using system.linq;using system.text;using  system.threading.tasks;//singleton design mode (single instance) namespace consoleapplication6{     Class program    {        static void  main (String[] args)         {             //Case:             singleton s = singleton.getsingleton ();             s.name =  "ASD";             singleton s1 = singleton.getsingleton ();             s1. ShowMsg ();             console.readkey();         }    }    class  singleton    {        //Static Class (self)          private static Singleton singleton = null;         //Private Constructor         private  singleton ()  { }        public static  Singleton getsingleton ()         {             if  (singleton == null)                  singleton = new singleton (); /instantiation             return singleton;         }         public string name { get; set; }         public void showmsg ()          {            console.writeline ( name);         }    }}

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Singleton design mode (single instance)