using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

​

public class Program

{

     public static void MealChangeventHandeler(object sender, MealChangetEventArgs e)

        {

            Console.WriteLine(" {0}  {1}  having {2} ", e.cust.FirstName, e.cust.LastName, e.cust.meal);

        }

​

    public static void Main()

    {  

            Customer c1 = new Customer();

            c1.FirstName = "shita";

            c1.LastName = "patel";

           // c1.mealchangeEvent = MealChangeventHandeler();

​

            Customer c2 = new Customer();

            c2.FirstName = "joe";

            c2.LastName = "Smith";

            // c2.meal = DinnerItems.Appetizer;

            Customer c3 = new Customer();

            c3.FirstName = "Jorsh";

            c3.LastName = "joshi";

            Customer c4 = new Customer();

            c4.FirstName = "Mona";

            c4.LastName = "patel";

            Customer c5 = new Customer();

            c5.FirstName = "Bay";

            c5.LastName = "Kanish";

​

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

            collection.Enqueue(c1);

            collection.Enqueue(c2);

            collection.Enqueue(c3);

            collection.Enqueue(c4);

            collection.Enqueue(c5);

            var tableevent = new TableEvent();

        //  var p = new Program();

​

​

​

            tableevent.Open();

​

            foreach (Customer i in collection)

            {

                //Program.MealChangeventHandeler += i.MealNext;

                //cust.mealchangeEvent +=i.MealNext();

                tableevent.TableEvent1 += i.HandleTable;

                //MealChanventHandeler();

​

​

​

​

            }

            Console.WriteLine("All Are FUll..!!");

            Console.ReadLine();

​

        }

​

​

​

​

​

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    }

​

​

​

​

    public delegate void MealChangeventHandeler(object source, MealChangetEventArgs e);

    public class MealChangetEventArgs : EventArgs

    {

        public Customer cust;

        public MealChangetEventArgs(Customer customer)

        {

            this.cust = customer;

        }

    }

​

    public class TableEvent

    {

        public event TableEventArg TableEvent1;

​

        public void Open()

        {

            Console.WriteLine("Tbae is open!");

            TableEventArg open = TableEvent1;

            if (open != null)

            {

                open(this, new TableNotification());

            }

​

​

        }

    }

​

public delegate void TableEventArg(object source, TableNotification e);

public class TableNotification : EventArgs

{

    public string Notify { get; set; }

    public TableNotification()

    {

        //this.Notify = notify;

​

    }

}

​

​

​

public enum Meal

{none,

    Appetizer,

    Main,

    Dessert,

    Done

​

}

​

public class Customer

​

    {

        public void HandleTable(object sender, TableNotification e)

        {

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

        }

​

        public string FirstName { get; set; }

        public string LastName { get; set; }

        public Meal meal { get; set; }

        public event MealChangeventHandeler mealchangeEvent;

        public void MealNext(Meal meal1)

        {

            MealChangeventHandeler changename = mealchangeEvent;

            switch (meal1)

            {

​

                case Meal.none:

                    this.meal = Meal.Appetizer;

                    if (mealchangeEvent != null)

                    {

                        changename(this, new MealChangetEventArgs(this));

                    }

                    break;

                case Meal.Appetizer:

                    this.meal = Meal.Main;

                    if (mealchangeEvent != null)

                    {

                        changename(this, new MealChangetEventArgs(this));

                    }

​

​

                    break;

                // return "Appetizer";

                case Meal.Main:

                    this.meal = Meal.Dessert;

                    if (mealchangeEvent != null)

                    {

                        changename(this, new MealChangetEventArgs(this));

                    }

                    break;

                //return "Main";

                case Meal.Dessert:

                    this.meal = Meal.Done;

                    if (mealchangeEvent != null)

                    {

                        changename(this, new MealChangetEventArgs(this));

                    }

                    break;

                //return "Dessert";

                case Meal.Done:

                    this.meal = Meal.Done;

                    if (mealchangeEvent != null)

                    {

                        changename(this, new MealChangetEventArgs(this));

                    }

                    break;

                //return "Done";

                default:

                    break;

                    //break;

​

​

​

            }

        }

​

    }