Program.cs

using System;

namespace Object_Oriented_Programming_In_CSharp {
   public class Program {
      static void Main(string[] args) {
         Arrow arrow = GetArrow();
         Console.WriteLine($"That arrow costs {arrow.Cost} gold.");
      }

      static Arrow GetArrow() {
         ArrowHead arrowhead = GetArrowheadType();
         Fletching fletching = GetFletchingType();
         float length = GetLength();

         return new Arrow(arrowhead, fletching, length);
      }

      static ArrowHead GetArrowheadType() {
         while (true) {
            Console.Write("Arrowhead type (steel, wood, obsidian): ");
            string input = (Console.ReadLine() ?? "").Trim().ToLower();

            switch (input) {
               case "steel":
                  return ArrowHead.Steel;

               case "wood":
                  return ArrowHead.Wood;

               case "obsidian":
                  return ArrowHead.Obsidian;

               default:
                  Console.WriteLine("Invalid choice. Try again.");
                  break;
            }
         }
      }

      static Fletching GetFletchingType() {
         while (true) {
            Console.Write("Fletching type (plastic, turkey, goose): ");
            string input = (Console.ReadLine() ?? "").Trim().ToLower();

            switch (input) {
               case "plastic":
                  return Fletching.Plastic;

               case "turkey":
                  return Fletching.TurkeyFeathers;

               case "goose":
                  return Fletching.GooseFeathers;

               default:
                  Console.WriteLine("Invalid choice. Try again.");
                  break;
            }
         }
      }

      static float GetLength() {
         while (true) {
            Console.Write("Arrow length (60 to 100): ");

            if (float.TryParse(Console.ReadLine(), out float length)) {
               // Fixed: Using C# logical AND (&&)
               if (length >= 60 && length <= 100)
                  return length;
            }

            Console.WriteLine("Invalid length. Try again.");
         }
      }
   }
}