using System;
 
public class Test
{
	public static void Main()
   {
      String[] values = { null, "160519", "9432.0", "16,667",
                          "   -322   ", "+4302", "(100);", "01FA", "11111", "1234", "1234-1234-1234" };
      foreach (var value in values) {
         int number;
 
         bool result = Int32.TryParse(value, out number);
         if (result == true)
         {
            Console.WriteLine("This input value is definitely not valid as it is a number.");         
         }
         else
         { 
            Console.WriteLine("Perhaps this can be a valid input value as it could not be parsed as integer.", 
                               value == null ? "<null>" : value);
         }
      }
   }
}

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