using System;
using System.Text.RegularExpressions;
 
public class Test
{
	public static void Main()
	{
		string pattern = @"(?<=Top Pay\D*)\d+(?:,\d+)*";
        string input = @"Top Pay: 1,000,000
Top Pay: 888,888";
        RegexOptions options = RegexOptions.IgnoreCase;
 
        foreach (Match m in Regex.Matches(input, pattern, options))
        {
        	var topPayMatch = int.Parse(m.Value, System.Globalization.NumberStyles.AllowThousands);
            Console.WriteLine(topPayMatch);
        }
	}
}

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