Reverse Hello world C#

ReverseHW C#

//namespace names this object.
namespace blaine
{
    class helloworld
    {
        //Every program starts with a Main method.
        //Static indicates that you can access this method without having an object of your class available.
        //void indicates to the compiler that your method will not return a value to the calling method.
        static void Main()
        {
            System.Console.WriteLine(reverseString("Hello"));

            System.Console.ReadKey();
        }

        static string reverseString(string original)
        {
            int cnt = (int)(original.Length / 2);
            char[] array = original.ToCharArray();

            //create for loop
            for (int i = 0; i < cnt; i++)
            {
                int j = original.Length - 1 - i;
                char temp = array[i];

                array[i] = array[j];
                array[j] = temp;
            }

            //store char array as string
            original = new string(array);
            System.Console.WriteLine(cnt);
            return original;
        }
    }
}