using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        //Find the Number of Occurrences of a Character in a String using C#

        string input = "WWW.C-SHARPCORNER.COM ";

        GetOccurance(input);

    }

​

    public static void GetOccurance(string input)

    {

        char[] charArr = input.ToCharArray();

        Dictionary<char, int> keyresult = new Dictionary<char, int>();

        List<char> charLst = new List<char>();

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

        {//Console.WriteLine(i);

            int count = 0;

            if (keyresult != null  && !keyresult.ContainsKey((charArr[i])))

            {

                count++;

            }

            else

            {

                keyresult.Add(charArr[i], count++);

            }

        }

​

        Console.WriteLine(keyresult.ToString());

    }

}