using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        string data = @"#294448

                        ORDER_STATUS1098988 VALID

                        24.09.2021 05:17 AM

                        Customer_ID: 5524335312265537

                        MMYY: 08/23

                        Txn_ID: 74627

                        Name: Krystal Flowers

                        E-mail: abc@gmail.com

                        Phone: 9109153030

                        Address_original: 1656 W Alvarado dr, Pueblo West, Colorado, 81007, United States

                        ZIP_City_State_Country: -

                        Type: -

                        Subtype: -

​

                        #294448

                        ORDER_STATUS1097728 VALID

                        24.09.2021 05:17 AM

                        Customer_ID: 5524331591654699

                        MMYY: 11/23

                        Txn_ID: 45617

                        Name: Allen E Prieto

                        E-mail: xyz@gmail.com

                        Phone: 5056994899

                        Address_original: 655 Ives Dairy Rd, Miami, Florida, 33179, United States

                        ZIP_City_State_Country: -

                        Type: -

                        Subtype: -";

        string pattern = @"(?<=Customer_ID:).*|(?<=MMYY:).*|(?<=Txn_ID:).*";

        var en = Regex.Matches(data, pattern, RegexOptions.IgnoreCase).GetEnumerator();

        while (en.MoveNext())

        {

            var ci = en.Current;

            if (!en.MoveNext())

                break;

            var di = en.Current;

            if (!en.MoveNext())

                break;

            var ti = en.Current;

            Console.WriteLine($"{ci} | {di} | {ti}");

        }

    }

}