using System;

public class Program

{

        public static string Scrub(string csvRecord, string prefix, char delimiter = ',')

        {

            if (string.IsNullOrEmpty(csvRecord) || string.IsNullOrEmpty(prefix))

            {

                return csvRecord;

            }

            int prefixIndex = csvRecord.IndexOf(prefix);

            if (prefixIndex == -1)

            {

                return csvRecord;

            }

            string left = csvRecord.Substring(0, prefixIndex).TrimEnd(' ', delimiter);

            string right = csvRecord.Substring(prefixIndex);

            int delimIndex = right.IndexOf(delimiter);

            right = delimIndex == -1 ? string.Empty : right.Substring(delimIndex);

            return left + right;

        }

        public static string Scrub(string csvRecord, string[] prefixes, char delimiter = ',')

        {

            string csv = csvRecord;

            if (prefixes != null && prefixes.Length > 0)

            {

                foreach (string prefix in prefixes)

                {

                    csv = Scrub(csv, prefix, delimiter);

                }

            }

            return csv;

        }

        public static void Main(string[] args)

        {

            Console.WriteLine(Scrub("abc,def,123,hij", "12"));

            Console.ReadLine();

        }

}