HMS abstract, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace HotelManagementSystem
{
    abstract class HMS
    {
        public virtual void Set()
        {
        }
    }
    class HotelManagementSystem : HMS
    {
        protected int HMSId;
        protected int HMSBilling;
        protected string HMSServicing;
        protected string HMSBookRoom;
        
        public void SetHMS(int StaffId, int bill, string service, string booking)
        {
            HMSId = StaffId;
            HMSBilling = bill;
            HMSServicing = service;
            HMSBookRoom = booking;
        }
        public string GetHMS()
        {
            return HMSServicing;
            return HMSBookRoom;
        }
        public static void Main(string[] args)
        {
            Hotel Management System HMSId = new Hotel Management System();
            StaffId.SetHMS(1,"Net");
            Console.WriteLine(HMSId, HMS());
            Console.ReadKey();
        }
    }
}

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