WordCount_v2

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Hmwrk_6_3
{
    class Program
    {
        static void Main(string[] args)
        {
            SortedDictionary<string,int> dictionary = new SortedDictionary<string, int>();
            string inputWords = File.ReadAllText("../../words.txt");
            string[] words = inputWords.Split(new string[] {Environment.NewLine}, StringSplitOptions.None);

            String pattern = @"[a-zA-Z']+";
            Regex regex = new Regex(pattern);


            using (var reader = new StreamReader("../../text.txt"))
            {
                string currentSentcence = reader.ReadLine();

                while (currentSentcence !=null)
                {

                  foreach (Match match in regex.Matches(currentSentcence))
                  {
                      for (int i = 0; i < words.Length; i++)
                        {

                            if (match.Value.ToLower() == words[i] && !(dictionary.ContainsKey(words[i])))
                            {
                                dictionary.Add(words[i], 1);
                            }


                            else if (match.Value.ToLower() == words[i])
                            {
                                dictionary[words[i]]++;
                            }

                         }

                    }
                    currentSentcence = reader.ReadLine();
                }

                foreach (var item in dictionary.OrderByDescending(key => key.Value))
                {
                    Console.WriteLine("{0} - {1}", item.Key, item.Value);
                }

            }
        }
    }
}