using System;

using System.Threading;

using System.Linq;

using System.Collections;

using System.Collections.ObjectModel;

using System.Collections.Generic;

using System.Collections.Specialized;

​

​

public class Program

{

​

    public void Main()

    {

     Customer cust =null;

​

     Table c = new Table();

        Queue<Customer> guestlist = new Queue<Customer>();

        guestlist.Enqueue(new Customer("Sachin", "Sharma"));

        guestlist.Enqueue(new Customer("Sunil", "Shukla"));

        guestlist.Enqueue(new Customer("Atul", "Vashisht"));

        guestlist.Enqueue(new Customer("Sumit", "Malhotra"));

        guestlist.Enqueue(new Customer("Monu", "Sharma"));

​

        int count = guestlist.Count();

        for (int i = 0; i < count; i++)

        {

            cust = guestlist.Dequeue();

            c.openevent += cust.GotTable;

            c.OnTableOpen();

            c.openevent -= cust.GotTable;

​

        }

        Console.WriteLine("Everyone is full!");

​

    }

​

​

}

​

public class Table

{

    public delegate void TableHandler(object source, TableEventArgs e);

   public event TableHandler openevent;

   public void OnTableOpen()

   {

       Console.WriteLine("Table is open");

       if (openevent!= null)

       {

          openevent(this,new TableEventArgs());

       }

   }

}

public class TableEventArgs : EventArgs

{

    public TableEventArgs()

    { }

}

    public class Customer

    {

        public string FirstName { get; set; }

        public string LastName { get; set; }

        public enum Meals { none, appetizer, main, desert, done };

        public Customer(string fname, string lname)

        {

            FirstName = fname;

            LastName = lname;

        }

        public void GotTable(object source, TableEventArgs e)

        {

            Console.WriteLine("{0} {1} got the table !", FirstName, LastName);

                foreach (var enumvalue in Enum.GetNames(typeof(Customer.Meals)))

                {

                    Console.WriteLine("{0} {1} is having {2}", this.FirstName, this.LastName, enumvalue);

                    Thread.Sleep(100);

                }

        }

    }

​

​

​