Вар 1. Зад 2 LetterHistogram

using System;
using System.Collections.Generic;
using System.Text;



namespace N_redica

{

    class Program

    {

        static void Main(string[] args)

        {

            string inputLine;
            Console.OutputEncoding = Encoding.UTF8;
            Console.InputEncoding = Encoding.UTF8;

            int countDigits = 0;
            int countWordsSum = 0;
            //char[] letters = new char[] { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
            SortedDictionary<char, int> histogram = new SortedDictionary<char, int>();

            do
            {

                inputLine = Console.ReadLine();

                inputLine.ToLower();
                string[] words = inputLine.Split(new char[] {',', '.', ' ',';',':','?','!','-','(',')','"','/'}, StringSplitOptions.RemoveEmptyEntries);
                char[] charArr = inputLine.ToCharArray();

                foreach(var item in charArr)
                {
                    if (item>=97 && item<=122)
                    {
                        if (histogram.ContainsKey(item) )
                        {
                            histogram[item]++;
                        }
                        else
                        {
                            histogram[item]=1;
                        }

                    }




                    if (item <= 57 && item>=48)
                    {
                        countDigits += 1;
                    }
                }
                /* foreach(var item in words)
                {
                    Console.Write(item+" ");
                }
               */
                countWordsSum += words.Length;

            } while (!inputLine.Equals(""));
            Console.WriteLine("Total words in the text: " + countWordsSum);
            Console.WriteLine("Total digits in the text: " + countDigits);

            foreach (KeyValuePair<char, int> pair in histogram)
            {
                if (pair.Value == 1)
                {
                    Console.WriteLine("{0} occurred {1} time", pair.Key, pair.Value);
                }
                else
                {
                    Console.WriteLine("{0} occurred {1} times", pair.Key, pair.Value);
                }

            }






        }

    }

}