using System;

using System.Collections.Generic;                   

public class Program

{

     private static readonly string Text = "Mary had a little lamb " + "little Lamb, little Lamb, " + "Mary had a Little lamb, " + "whose fleece were white as snow.";

        public static void Main()

        {

            IDictionary<String, int> wordOccurrenceMap = GetWordOccurrenceMap(Text);

            PrintWordOccurrenceCount(wordOccurrenceMap);

        }

        private static IDictionary<string, int> GetWordOccurrenceMap(string text)

        {

            string[] tokens = text.Split(' ', '.', ',', '-', '?', '!');

            IDictionary<string, int> words = new SortedDictionary<string, int>();

            foreach (string word in tokens)

            {

                if(!string.IsNullOrEmpty(word.Trim()))

                {

                    int count;

                    if(!words.TryGetValue(word, out count))

                    {

                        count = 0;

                    }

                    words[word] = count + 1;

                }

            }

            return words;

        }

        private static void PrintWordOccurrenceCount(IDictionary<string, int> wordOccurenceMap)

        {

            foreach (var wordEntry in wordOccurenceMap)

            {

                Console.WriteLine("Word '{0}' occurs {1} time(s) in the text", wordEntry.Key, wordEntry.Value);

            }

        }

}