Proxy Pattern

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication107
{

    public interface IEquipment
    {
        string GetData();
    }

    public class Equipment : IEquipment
    {
        string itemName;
        public int intemId;
        public Equipment()
        {
            itemName = "Iron Sword";
            intemId = 4;
        }

        public string GetData()
        {
            return (itemName + "   ID:  "+ intemId.ToString());
        }
    }

    public class EquipmentProxy : IEquipment
    {
        Equipment client = new Equipment();

        public string GetData()
        {
            if (client.intemId == 4)
                return client.GetData();

            else
                return "Item is not in inventory";
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            EquipmentProxy proxy = new EquipmentProxy();
            Console.WriteLine("Data from Proxy: \n"+ proxy.GetData());

            Console.ReadKey();
        }
    }
}