using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var guidstring = " D364800B-D75E-456A-90F7-12A2751350BF";

            var getNumbers = (from t in guidstring

                              where char.IsDigit(t)

                              select t).ToArray();

            Console.WriteLine(getNumbers);

    }

}