using System;

using System.Linq;

using System.Collections.Generic;

using System.Text.RegularExpressions;

public static class Program

{

    private static string parseTaxonomyField(string valStr)

    {

        if(valStr.Contains("#"))

        {

            valStr = string.Join(";", valStr.Split(new [] {';'},  StringSplitOptions.RemoveEmptyEntries).Where(x => x.Contains("#") && x.Contains("|")).Select(s => s.Replace("#", string.Empty)));

        }

        if(valStr.Contains(";"))

        {

            valStr = string.Join(",", valStr.Split(new [] {';'},  StringSplitOptions.RemoveEmptyEntries).Select(x => x.Substring(0, x.IndexOf('|'))));

        }

        return valStr;

    }

    private static void updateTaxonomyFieldsInDictionary(Dictionary<string, string[]> dict, List<string> fields = null)

    {

        fields = fields ?? new List<string>();

        foreach(string s in fields)

        {

            if(dict.ContainsKey(s))

            {

                for (int i = 0; i < dict[s].Length; i++)

                {

                    dict[s][i] = parseTaxonomyField(dict[s][i]);

                }

            }

        }

    }

    public static void Main()

    {

        Dictionary<string, string[]> myDict = new Dictionary<string, string[]>();

        myDict.Add("tax", new[] {"241;#Czech Republic|d7277d38-bce7-4885-903d-5857d0752ddf;#459;#Slovakia|17a14aed-85c0-40ee-b47f-78c0f2b2dce0", "Czech Republic|d7277d38-bce7-4885-903d-5857d0752ddf;Poland|6ea11f3e-8588-40fb-b3e0-76d20d0681eb;Slovakia|17a14aed-85c0-40ee-b47f-78c0f2b2dce0"});

        string[] dupa = new string[] {"dupa", "dupa2"};

        var str1="241;#Czech Republic|d7277d38-bce7-4885-903d-5857d0752ddf;#459;#Slovakia|17a14aed-85c0-40ee-b47f-78c0f2b2dce0";

        var str2 = "Czech Republic|d7277d38-bce7-4885-903d-5857d0752ddf;Poland|6ea11f3e-8588-40fb-b3e0-76d20d0681eb;Slovakia|17a14aed-85c0-40ee-b47f-78c0f2b2dce0";

        //myDict["tax"][0] = parseTaxonomyField(myDict["tax"][0]);

        //myDict["tax"][1] = parseTaxonomyField(myDict["tax"][1]);

        Console.WriteLine(myDict["tax"][0]);

        Console.WriteLine(myDict["tax"][1]);

        updateTaxonomyFieldsInDictionary(myDict, new List<string> {"tax"});

        Console.WriteLine(myDict["tax"][0]);

        Console.WriteLine(myDict["tax"][1]);

        Console.WriteLine(parseTaxonomyField(""));

        List<string> oko = new List<string>();

    }

​

​

​

​

​

​

}

​