Write a C# Sharp program to create a new string from a given string. If the first or first two characters is 'a', return the string without those 'a' characters otherwise return the original given string

using System;
namespace exercises
{
   class Program
    {       
        static void Main(string[] args)
        {
            Console.WriteLine(test("abcab"));
            Console.WriteLine(test("python"));
            Console.WriteLine(test("aacda"));
            Console.WriteLine(test("jython"));
           
            Console.ReadLine();
        }

    public static string test(string s1)
          {
            if (s1.Length == 1 && s1.Substring(0, 1) == "a")
            {
                s1 = s1.Remove(0, 1);
            }

            if (s1.Length > 1)
            {
                if (s1.Substring(1, 1) == "a")
                {
                    s1 = s1.Remove(1, 1);
                }

                if (s1.Substring(0, 1) == "a")
                {
                    s1 = s1.Remove(0, 1);
                }
            }

            return s1;
        }
   }
}