using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string findGuid = "http://0.0.0.0/xxxxxx/org_xxxx/27619_6476400f-8d38-4f15-9444-5e07e6ad7ac3.png"; //Initialize a new string value

        MatchCollection guids = Regex.Matches(findGuid, @"(\{){0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}"); //Match all substrings in findGuid

        for (int i = 0; i < guids.Count; i++)

        {

            string Match = guids[i].Value; //Set Match to the value from the match

                Console.WriteLine(Match);; //Show the value in a messagebox (Not required)

        }

        string findGuid2 = "http://0.0.0.0/xxxxxx/org_xxxx/27619_6476400f-8d38-4f15-9444-5e07e6ad7ac3.png"; //Initialize a new string value

        MatchCollection guids2 = Regex.Matches(findGuid, @"(\{){0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}\.[A-Za-z0-9]{0,5}"); //Match all substrings in findGuid

        for (int i = 0; i < guids2.Count; i++)

        {

            string Match = guids2[i].Value; //Set Match to the value from the match

                Console.WriteLine(Match);; //Show the value in a messagebox (Not required)

        }

    }

}