Write a C# Sharp program to check if a string 'yt' appears at index 1 in a given string. If it appears return a string without 'yt' otherwise return the original string

using System;
namespace exercises
{
   class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(test("Python"));
            Console.WriteLine(test("ytade"));
            Console.WriteLine(test("jsues"));
            Console.ReadLine();

        }
        public static string test(string str)
        {
            return str.Substring(1, 2).Equals("yt") ? str.Remove(1, 2) : str;
        }
    }
}