C# Program for Counting Number Of Alphabets In A Word

class Program
{
    static void Main(string[] args)
    {
        String s = "Hello World";
        while (s.Length > 0)
        {
            Console.Write(s[0] + ":");
            int count = 0;
            for (int i = 0; i < s.Length; i++)
            {
                if (s[0] == s[i])
                {
                    count++;
                }
            }
            Console.WriteLine(count);
            s = s.Replace(s[0].ToString(), string.Empty);
        }
        Console.Read();
    }
}