Decorator Design Pattern

namespace DecoratorPattern
{
    class Program
    {
        public interface SurgeryWard
        {
            string GetRoomName();
           
            double GetPayment();
        }

        class FourBeddedRoom : SurgeryWard
        {
            private string roomname="Four Bedded Room";

            private double roompayment = 1000.0;

            public string GetRoomName()
            {
                return roomname;
            }

            public double GetPayment()
            {
                return roompayment;
            }
        }

        class TwoBeddedRoom : SurgeryWard
        {
            private string roomname="Two Bedded Room";
            private double roompayment = 2000.0;

            public string GetRoomName()
            {
                return roomname;
            }

            public double GetPayment()
            {
                return roompayment;
            }

        }
        class SingleRoom : SurgeryWard
        {
            private string roomname="SingleRoom";
            private double roompayment = 3000.0;

            public string GetRoomName()
            {
                return roomname;
            }

            public double GetPayment()
            {
                return roompayment;
            }
        }
        public abstract class Decorator : SurgeryWard
        {
            SurgeryWard RoomType = null;

            protected string addedamenity = "Undefined Decorator";
            protected double amenitypayment = 0.0;

            protected Decorator(SurgeryWard RoomTypee)
            {
                RoomType = RoomTypee;
            }

            #region SurgeryWard Members

            string SurgeryWard.GetRoomName()
            {
                return string.Format("{0}, {1}", RoomType.GetRoomName(), addedamenity);
            }

            double SurgeryWard.GetPayment()
            {
                return amenitypayment + RoomType.GetPayment();
            }

            public void Show()
            {
                string a = string.Format("{0}, {1}", RoomType.GetRoomName(), addedamenity);
                double b = amenitypayment + RoomType.GetPayment();
                Console.WriteLine("RoomDetails {0} Payment {1}", a, b);
            }
           
            #endregion
        }
        class TelevisionDecorator : Decorator
        {
            public TelevisionDecorator(SurgeryWard RoomTypee)
                : base(RoomTypee)
            {
                this.addedamenity = "Television";
                this.amenitypayment = 100.0;
            }

        }
        class LockerDecorator : Decorator
        {
            public LockerDecorator(SurgeryWard RoomTypee)
                : base(RoomTypee)
            {
                this.addedamenity = "Locker";
                this.amenitypayment = 200.0;
            }
        }
        class WifiDecorator : Decorator
        {
            public WifiDecorator(SurgeryWard RoomTypee)
                : base(RoomTypee)
            {
                this.addedamenity = "Wifi";
                this.amenitypayment = 300.0;
            }
        }
        class SofaBedDecorator : Decorator
        {
            public SofaBedDecorator(SurgeryWard RoomTypee)
                : base(RoomTypee)
            {
                this.addedamenity = "SofaBed";
                this.amenitypayment = 400.0;
            }
        }
        class MiniFridgeDecorator : Decorator
        {
            public MiniFridgeDecorator(SurgeryWard RoomTypee)
                : base(RoomTypee)
            {
                this.addedamenity = "MiniFridge";
                this.amenitypayment = 500.0;
            }
        }
        class WritingTableDecorator : Decorator
        {
            public WritingTableDecorator(SurgeryWard RoomTypee)
                : base(RoomTypee)
            {
                this.addedamenity = "WritingTable";
                this.amenitypayment = 6.0;
            }
        }
        static void Main(string[] args)
        {
            SingleRoom sr = new SingleRoom();
            WifiDecorator wd = new WifiDecorator(sr);
            TelevisionDecorator td = new TelevisionDecorator(wd);

            td.Show();

        }
    }
}