using System.Diagnostics.Metrics;

namespace SplitCharsIntoCountExtentions
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string input = "a";
            Console.WriteLine($"Word count: {input.CharCount('a')}");
        }
    }
    static class CharCountExtension
    {
        public static int CharCount(this string input, char letter)
        {
            int counter = 0;
            foreach (var item in input)
            {
                if (item == letter)
                {
                    counter++;
                }
            }
            return counter;
        }
    }
}