using System;

using System.Linq;

​

public class Program

{

    public static void Main ()

    {

         Console.WriteLine("Enter words. Counts the frequency of words.");

         var Answer1 = Console.ReadLine();

         GetWordsFrequencyCount(Answer1);

         Console.WriteLine("Enter words. Counts the frequency of words with the same length.");

         var Answer2 = Console.ReadLine();

         GetWordsLenthFrequencyCount(Answer2);

    }

    public static void GetWordsFrequencyCount(string str)

    {

       var result  = str.Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries)

               .GroupBy(r => r, StringComparer.InvariantCultureIgnoreCase)

                .Select(grp => new

                    {

                        Word = grp.Key,

                        Count = grp.Count()

                    });

    foreach (var item in result)

        {

            Console.WriteLine("{0} : {1}", item.Word, item.Count);

        }

   }

   public static void GetWordsLenthFrequencyCount(string str)

    {

       var result  = str.Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries)

             .GroupBy(r => r.Length)

                .Select(grp => new

                    {

                        Length = grp.Key,

                        Count = grp.Count()

                    });

    foreach (var item in result)

        {

            Console.WriteLine("Length of word: {0} , Count: {1}", item.Length, item.Count);

        }

    }

}

​