try
            {
                StreamReader sr = new StreamReader(@"C:Readfile.txt");
                text = sr.ReadToEnd();

                string textData = Regex.Replace(text, @"[^0-9a-zA-Z]+", " ");

                char[] whitespace = new char[] { ' ', 't' };
                string[] data = textData.Split(whitespace);
                int i = 1;

                while (i < data.Length)
                {
                    st = data[i];

                    string[] source = text.Split(new char[] { '.', '?', '!', ' ', ';', ':', ',' }, StringSplitOptions.RemoveEmptyEntries);

                    var matchQuery = from word in source
                                     where word.ToLowerInvariant() == st.ToLowerInvariant()
                                     select word;

                    int wordCount = matchQuery.Count();
                    k += wordCount + ": " + st + "n";
                    //MessageBox.Show(k);
                    i++;
                }
                StreamWriter sr4 = new StreamWriter(@"C:WhatFound.txt");
                sr4.Write(k);

            }
            catch (Exception ce)
            {
            }
        }