using System;

using System.Collections.Generic;                   

public class Program

{

    public static void Main()

    {

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

        List<char> elements = new List<char>{'A', 'B','C','C','C','A','B', 'C', 'C'};

        int result = 0;

        foreach(char element in elements)

        {

            if(occurances.TryGetValue(element, out result))

                occurances[element] = result + 1;

            else

                occurances.Add(element, 1);

        }

        foreach(KeyValuePair<char, int> kv in occurances)

            Console.WriteLine("Key: "+ kv.Key + " Value: "+kv.Value);

    }

}