CountCharaqctes

public static Dictionary<char, int> Count(string value)
{
    var dictionary = new Dictionary<char, int>();

    char[] chars = value.ToCharArray();

    for (int i = 0; i < chars.Length; i++)
    {
        if (dictionary.ContainsKey(chars[i]))
        {
            dictionary[chars[i]]++;
        }
        else
        {
            dictionary.Add(chars[i], 1);
        }
    }

    return dictionary;
}