Write a C# Sharp program to create a new string from a given string without the first two characters. Keep the first character if it is "p" and keep the second character if it is "y"

using System;
namespace exercises
{
   class Program
    {       
        static void Main(string[] args)
        {
            Console.WriteLine(test("abcab"));
            Console.WriteLine(test("python"));
            Console.WriteLine(test("press"));
            Console.WriteLine(test("jython"));
           
            Console.ReadLine();
        }
    public static string test(string s1)
          {
           if (s1.Length >= 2)
            {
                if (String.Compare(s1.Substring(1, 1), "y") != 0)
                {
                    s1 = s1.Remove(1, 1);
                }

                if (String.Compare(s1.Substring(0, 1), "p") != 0)
                {
                    s1 = s1.Remove(0, 1);
                }
            }
            else if (s1.Length > 0 && String.Compare(s1.Substring(0, 1), "p") != 0)
            {
                s1 = s1.Remove(0, 1);
            }

            return s1;
          }    
   }
}