using System;

using System.Text.RegularExpressions;

using System.Net;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

​

        Dictionary<string, int> wordCount = GetWordsFrequencyCount("My bike and my book");

​

        string frequency = string.Join(", ", wordCount.Select(x => "\"" + x.Key + "\"" + ": " + x.Value).ToArray());

        Console.WriteLine(frequency);

​

        Dictionary<int, int> wordLength = GetWordsFrequencyCountLength("My bike and my book");

        string fLength = string.Join(", ", wordLength.Select(x => x.Key + ": " + x.Value).ToArray());

        Console.WriteLine(fLength);

​

    }

​

    public static Dictionary<string, int> GetWordsFrequencyCount(string text)

    {

        var dict = new Dictionary<string, int>();

        string[] arr = text.ToLower().Split(' ');

        foreach(string word in arr)

        {

            if (dict.ContainsKey(word))

            {

                dict[word]++;

            }

            else

            {

                dict[word] = 1;

            }

        }

        return dict;

    }

    public static Dictionary<int, int> GetWordsFrequencyCountLength(string text)

    {

        var dict = new Dictionary<int, int>();

        string[] arr = text.ToLower().Split(' ');

​

        int strLength= 0;

        int val = 0;

​

        for (int i = 0; i < arr.Length; i++)

        {

            strLength = arr[i].Length;

            if (dict.TryGetValue(strLength, out val))

            {

                dict[strLength] = val + 1;

            }

            else

            {

                dict.Add(strLength, 1);

            }

        }

        return dict;

    }

}