using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        var match = Regex.Match("-m message -c configuration", @"^((?<peto>-\w\s\w+)(\s|$))+$");

​

            foreach (Capture capture in match.Groups["peto"].Captures)

                Console.WriteLine(capture.Value);

    }

}