Write a C# Sharp program to create a new string without the first and last character of a given string of length at least two

using System;
namespace exercises
{
   class Program
    {       
        static void Main(string[] args)
        {
            Console.WriteLine(test("Hello"));
            Console.WriteLine(test("Hi"));
            Console.WriteLine(test("Python"));
            Console.ReadLine();
        }       
         public static string test(string s1)
            {
             return s1.Substring(1)
                .Substring(0, s1.Length - 2);
         }
  }
}