07. Query Mess

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Query_Mess
{
    class Program
    {
        static void Main(string[] args)
        {
            var consoleInput = Console.ReadLine();
            string keypattern = @"([^&=?\s]*(?=\=))";
            string valuepattern = @"(?<=\=)([^&=\s]*)";

            var results = new Dictionary<string, List<string>>();

            while (consoleInput != "END")
            {
                var input = consoleInput.Split(new char[] { '&' }).ToList();

                for (int i = 0; i < input.Count; i++)
                {
                    Match keymatch = Regex.Match(input[i], keypattern);

                    var key = keymatch.Groups[1].Value;

                    if (keymatch.Groups[1].Value != null)
                    {
                        key = Regex.Replace(key, @"\+|%20", x => " ").ToString().Trim(); // skip key+, key+=>key
                    }

                    if (results.ContainsKey(key) == false)
                    {

                        results.Add(key, new List<string>());
                    }


                    MatchCollection matches = Regex.Matches(input[i], valuepattern);

                    foreach (Match item in matches)
                    {

                        string currentMatch = item.Groups[1].Value;

                        var splited = currentMatch.Split(new string[] { "%20", "+", "?" }, StringSplitOptions.RemoveEmptyEntries).ToList();


                        results[key].Add(String.Join(" ", splited));


                    }

                }


                foreach (var item in results)
                {
                    Console.Write($"{item.Key}=[{String.Join(", ", item.Value)}]");
                }
                Console.WriteLine();

                results.Clear();

                consoleInput = Console.ReadLine();
            }
        }
    }
}