Code For Count the String ?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {

            int cnt = 0;
            string str = "Sabarimahesh";
            foreach (char chh in str)
            {
                if (char.IsLetter(chh))
                {
                    cnt++;
                }
            }
            Console.WriteLine(cnt.ToString());
            Console.ReadLine();
        }
    }
}