Arrow.cs

namespace Object_Oriented_Programming_In_CSharp {
   public enum ArrowHead {
      Steel,
      Wood,
      Obsidian
   }
   public enum Fletching {
      Plastic,
      TurkeyFeathers,
      GooseFeathers
   }
   public class Arrow {
      public ArrowHead _ArrowHead { get; }
      public Fletching _Fletching { get; }
      public float _Length { get; }

      public float Cost {
         get {
            return GetArrowheadCost() + GetFletchingCost() + _Length * 0.05f;
         }
      }

      public Arrow(ArrowHead arrowhead, Fletching fletching, float length) {
         if (length < 60 || length > 100)
            throw new ArgumentException("Length must be between 60 and 100.");

         _ArrowHead = arrowhead;
         _Fletching = fletching;
         _Length = length;
      }

      private float GetArrowheadCost() {
         return _ArrowHead switch {
            ArrowHead.Steel => 10,
            ArrowHead.Wood => 3,
            ArrowHead.Obsidian => 5,
            _ => 0
         };
      }

      private float GetFletchingCost() {
         return _Fletching switch {
            Fletching.Plastic => 10,
            Fletching.TurkeyFeathers => 5,
            Fletching.GooseFeathers => 3,
            _ => 0
         };
      }
   }
}