using System;
using System.Text.RegularExpressions;
 
class Program
{
    static void Main()
    {
	// First we see the input string.
	string input = "20,000";
 
	// Here we call Regex.Match.
	Match match = Regex.Match(input, @"^\d*[-+,]?\d*$",
	    RegexOptions.IgnoreCase);
 
	// Here we check the Match instance.
	if (match.Success)
	{
	    // Finally, we get the Group value and display it
	    Console.WriteLine("successfully matched");
	}
    }
}

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