public Dictionary<string, SortedSet<int>> CountStream()
        {
            Dictionary<string, SortedSet<int>> dctWords = new Dictionary<string, SortedSet<int>>();
            string buffer = string.Empty;

            foreach (char ch in sToSearch)
            {
                buffer += ch;

                foreach(string word in lstSearchFor) {
                    int iSearchIndex = 0;
                    while ((iSearchIndex = buffer.IndexOf(word, iSearchIndex)) != -1)
                    {
                        if (!dctWords.ContainsKey(word))
                        {
                            dctWords.Add(word, new SortedSet<int>());
                            dctWords[word].Add(iSearchIndex);
                        }
                        else
                        {
                            if (!dctWords[word].Contains(iSearchIndex))
                                dctWords[word].Add(iSearchIndex);
                        }
                        iSearchIndex++;
                    }
                }
            }
            return dctWords;
        }