using System;
using System.IO;
using System.Text.RegularExpressions;
public sealed class Utils
{
public static bool IsNumeric(string input)
{
Regex r = new Regex(@"^-?[0-9]{1,}\.?[0-9]{0,}$");
if (r.Match(input).Success)
return true;
else
return false;
}
}