private void ChangeToNumber(object sender, SelectionChangedEventArgs e)
        {
            var selectedIndex = seletlist.SelectedIndex;

            if (selectedIndex == 0)
            {
                ConvertionMethod = NumberUnits.Binary;
            }
            else if (selectedIndex == 1)
            {
                ConvertionMethod = NumberUnits.HexaDecimal;
            }
            else if (selectedIndex == 2)
            {
                ConvertionMethod = NumberUnits.Octal;
            }
        }
 public static string GetResult(long input, NumberUnits method)
 {
     if (method == NumberUnits.Binary)
     {
         return(Convert.ToString(input, 2));
     }
     else if (method == NumberUnits.HexaDecimal)
     {
         return(Convert.ToString(input, 16));
     }
     else if (method == NumberUnits.Octal)
     {
         return(Convert.ToString(input, 8));
     }
     else
     {
         return("");
     }
 }