public Hamburger createBurger(string burgerType)
 {
     if (burgerType == "veggie light")
     {
         VeggHambBuilderLettuce vb = new VeggHambBuilderLettuce();
         vb.BuildHamburger();
         Console.WriteLine("Creating veggie light burger");
         return(vb.GetHamburger());
     }
     else if (burgerType == "veggie")
     {
         VeggHamburgerBuilder v = new VeggHamburgerBuilder();
         v.BuildHamburger();
         Console.WriteLine("Creating veggie burger");
         return(v.GetHamburger());
     }
     else if (burgerType == "susu")
     {
         SusuBuilder s = new SusuBuilder();
         s.BuildHamburger();
         Console.WriteLine("Creating susu burger");
         return(s.GetHamburger());
     }
     else if (burgerType == "susu lettuce")
     {
         SusuBuilderLettuce sl = new SusuBuilderLettuce();
         sl.BuildHamburger();
         Console.WriteLine("Creating susu lettuce burger");
         return(sl.GetHamburger());
     }
     else
     {
         return(null);
     }
 }
        public Hamburger CreateBurger(string burgerType)
        {
            if (burgerType == "veggie")
            {
                Console.WriteLine("Creating veggie burger...");
                VeggHamburgerBuilder b = new VeggHamburgerBuilder();
                b.BuildHamburger();

                return(b.GetHamburger());
            }
            else if (burgerType == "veggie lettuce")
            {
                Console.WriteLine("Creating veggie lettuce burger...");
                VeggHambBuilderLettuce b = new VeggHambBuilderLettuce();
                b.BuildHamburger();

                return(b.GetHamburger());
            }
            else if (burgerType == "susu")
            {
                Console.WriteLine("Creating susu burger...");
                SusuBuilder b = new SusuBuilder();
                b.BuildHamburger();

                return(b.GetHamburger());
            }
            else if (burgerType == "susu lettuce")
            {
                Console.WriteLine("Creating susu lettuce burger...");
                SusuBuilderLettuce b = new SusuBuilderLettuce();
                b.BuildHamburger();

                return(b.GetHamburger());
            }

            throw new ArgumentException($"cannot create {burgerType} burger!");
        }