public static int CountOccurrences(string[] words, string word)
        {
            int count = 0;
            for (int i = 0; i < words.Length; i++)
            {
                if (String.Compare(word, words[i]) == 0)
                {
                    count++;
                }
            }
            return count;
        }
        /// <summary>
        /// Counts all the occurrences of all the unique words
        /// </summary>
        /// <param name="text">Whole text</param>
        /// <param name="uniqueWords">All unique words</param>
        /// <param name="punctuation">Punctuation</param>
        /// <returns></returns>
        public static int[] UniqueWordsOccurrences(string text, string[] uniqueWords, char[] punctuation)
        {
            string[] words = text.Split(punctuation);
            int[] occurrences = new int[uniqueWords.Length];
            for (int i = 0; i < occurrences.Length; i++)
            {
                occurrences[i] = CountOccurrences(words, uniqueWords[i]);
            }
            return occurrences;
        }