TextAnalyzer

using System;
using System.Collections;
using System.Text;
using System.IO;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
using System.Linq;


namespace MultiThreadTextAnalyzer
{
    class Program
    {
       
        public static Dictionary<string, int> Transform(List<string> wordList)
        {
            List<string> transformed = new List<string>();
            var sync = new object();
            Parallel.ForEach<String>(wordList, wds =>
            {
              
                if (wds.Length >= 3)
                {
                    int i = 0;
                    string temp = "";

                    while (i < wds.Length - 2)
                    {
                        temp = wds.Substring(i, wds.Length - i);
                        lock (sync)
                        {
                            transformed.Add(temp.Substring(0, 3));
                        }
                        i++;
                    }

                }
                
            });
            transformed.Sort();
            Dictionary<string, int> dict = new Dictionary<string, int>();
            for (int i = 0; i < transformed.Count; i++)
            {
                string brand = transformed[i];
                int count = 1;
                if (dict.ContainsKey(brand))
                    count = dict[brand] + 1;

                dict[brand] = count;
            }
            return dict;
        }
        public static void listGen(StreamReader sr, List<string> wordList)
        {
            int i = 0;
            string s = string.Empty;
            char c = '\0';
            while ((i = sr.Read()) != -1)
            {

                c = Convert.ToChar(i);
                if (Char.IsDigit(c) || Char.IsLetter(c))
                {
                    s = s + c;
                }
                else
                {
                    if (s.Trim() != string.Empty)
                        wordList.Add(s);
                    s = string.Empty;
                }

            }
        }
        static void Main(string[] args)
        {

           
           
            Console.WriteLine("TEXT ANALYZER","\n");
            string dir = "";
            StreamReader file = null;
            List<string> words = new List<string>();
            try
            {
                while (true) {
                    Console.WriteLine("Enter the file path..");
                    dir = @"" + Console.ReadLine();
                    Stopwatch stopwatch = new Stopwatch();
                    stopwatch.Start();


                    file = new StreamReader(dir);   


                    listGen(file, words);
                    Dictionary<string, int> rating = Transform(words);
                    var sortedDict = from entry in rating orderby entry.Value descending select entry;

                    for (int i = 0; i < 10; i++)
                    {
                        Console.WriteLine("Triplet  " + sortedDict.ElementAt(i).Key + " is found in this file " + sortedDict.ElementAt(i).Value + " times.");
                    }


                    stopwatch.Stop();
                    Console.WriteLine("Elapsed Time is {0} ms", stopwatch.ElapsedMilliseconds);
                    

                }
                   


                
                

                

            }
            catch (Exception e)
            {
                if (e is FileNotFoundException)
                    Console.WriteLine("Error reading from {0}. Message = {1}", dir, e.Message);
                
            }
            finally
            {
                if (file != null)
                {
                    file.Close();


                }
            }


        }
    }
}