XML : Trying to read from xml inside timer but its not working

I Want to print the number 1 to 6 every 5 sec and stop timer when reaching the end of the list

  private static void Main(string[] args)  {              List<int> l = new List<int>() {1,2,3,4,5,6};      XElement xdoc = XElement.Load("../../XMLFile1.xml");      xdoc.Element("num").Value = "0";      xdoc.Element("max").Value = l.Count.ToString();      xdoc.Save("../../XMLFile1.xml");      Timer t = new Timer(printnum, null, 0, 5000);             }    public static void printnum(Object o)  {      try      {          XElement xdoc = XElement.Load("../../XMLFile1.xml");          int num = int.Parse(xdoc.Element("num").Value);          int max = int.Parse(xdoc.Element("max").Value);          if (num<max)          {              Console.WriteLine(num);              num += 1;              xdoc.Element("num").Value = num.ToString();              xdoc.Save("../../XMLFile1.xml");          }                }      catch (Exception e)      {        }  }    

This is my xml file named XMLFile1.xml the num is running number and max is the list max number

  <?xml version="1.0" encoding="utf-8"?>  <root>      <num>0</num>      <max>0</max>  </root>