using System;

using System.Collections.Generic;

using System.Text;

public class Program

{

    public static void Main()

    {

        string s = $"custattr3=esk_koorder|queue|321-123-123|;td.entityRef=321312-31-23-21-;centreftype=contact;";

​

        string[] subs = s.Split('|');

        var test = ParseToDictionary(s, ';', true);

​

        foreach (KeyValuePair<string, string> attr in test)

        {

            if (attr.Key.ToLower().StartsWith("custattr"))

            {

                var split = attr.Value.Split('|');

                for (var i = 0; i < 3; i++) 

                {

                    Console.WriteLine(split[i]);

                }

​

            }

        }

​

    }

    public static Dictionary<string, string> ParseToDictionary(string buffer, char delim, bool decode = false, bool preDecode = false) {

        Dictionary<string, string> tagDict = new Dictionary<string, string>();

​

        if (preDecode)

        {

            buffer = DecodeString(buffer);

        }

​

        string[] nvpArray = buffer.Split(delim);

        foreach (string nvp in nvpArray) {

            if (nvp.Length == 0)

                continue;

            int nvpDelimPos = nvp.IndexOf('=');

            if (nvpDelimPos == -1) {

                continue;

            }

            if(decode)

            {

                string str = nvp.Substring(nvpDelimPos + 1);

                string decodedVal = DecodeString(str);

                tagDict.Add(nvp.Substring(0, nvpDelimPos), decodedVal);

            }

            else

            {

                tagDict.Add(nvp.Substring(0, nvpDelimPos), nvp.Substring(nvpDelimPos + 1));

            }

​

        }

​

        return tagDict;

    }

    private static string DecodeString(string str)

    {

        return new StringBuilder(str.Replace("#23", "#").Replace("#3B", ";").Replace("#3D", "=").Replace("#0D", "\x0d").Replace("#0A", "\x0a").Replace("#0B", "\x0b")).ToString();

    }

​

}