using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Dictionary<char, int> dctResult = GetCount("Hello World");

        foreach(KeyValuePair<char, int> k in dctResult)

        {

            Console.WriteLine(k.Key + " " + k.Value.ToString());

        }

    }

    public static Dictionary<Char, int> GetCount(string strText)

        {

        Dictionary<Char, int> dctResult= new Dictionary<Char, int>();

        Char[] chrArr = strText.ToCharArray();

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

            {

                int k = 1;

                Char chrText = chrArr[i];

                if(!dctResult.ContainsKey(chrArr[i]))

                {

                dctResult.Add(chrArr[i], k);

                }

                for (int j=i+1; j < chrArr.Length; j++)

                {

                    if(chrArr[i] == chrArr[j])

                    {

                        k++;

                        dctResult[chrText] = k;

                    }

                }

            }

        return dctResult;

        }

}