Phonebook

namespace Phonebook
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;

    public class Startup
    {
        private static Dictionary<string, string> phonebook;
        private static StringBuilder result;

        public static void Main()
        {
            phonebook = new Dictionary<string, string>();
            result = new StringBuilder();

            ReadInputsUntillEndWordAndExcecuteFunction("search", SplitStringAndSave);
            ReadInputsUntillEndWordAndExcecuteFunction("stop", SearchNameAndSaveResultToResult);

            Console.Write(result);
        }

        private static void ReadInputsUntillEndWordAndExcecuteFunction(string endWord, Action<string> toExecute)
        {
            string inputLine = Console.ReadLine();
            while (inputLine != endWord)
            {
                toExecute(inputLine);

                inputLine = Console.ReadLine();
            }
        }

        private static void SearchNameAndSaveResultToResult(string toSearch)
        {
            if (phonebook.ContainsKey(toSearch))
            {
                result.AppendLine($"{toSearch} -> {phonebook[toSearch]}");
            }
            else
            {
                result.AppendLine($"Contact {toSearch} does not exist.");
            }
        }

        private static void SplitStringAndSave(string toSplit)
        {
            string[] contactInfo = toSplit.Split('-');

            if (contactInfo.Length != 2)
            {
                return;
            }

            phonebook[contactInfo[0]] = contactInfo[1];
        }
    }
}