C# string.Format 연습

  string d = "20000127"; 
            int dd = int.Parse(d.Substring(2, 6)); 
             
            string f = "2017/01/22"; 
            int i = 55424225; 
            string n = string.Format("{0:##-##-##}", dd); 
            string nn = n.PadLeft(8, '0'); 
            string m = string.Format("{0:#,###}", i); 
            Console.WriteLine(nn + "  : " + m);