static void Main(string[] args)
        {
            BookStore hengelo = new BookStore();

            hengelo.Stocks        = Product.GetTestData();
            hengelo.BusinessHours = "Ma-Vr 8:00 - 15:00";
            hengelo.ContactInfo   = "Vind me op mijn website: www.bookstore-hengelo.nl";

            int option;

            do
            {
                Console.WriteLine("[ 1 ] Print stock");
                Console.WriteLine("[ 2 ] Generate order");
                Console.WriteLine("[ 3 ] Sell book");
                Console.WriteLine("[ 4 ] Add new book or magazine");
                Console.WriteLine("[ 5 ] Delete a book or magazine");


                while (!int.TryParse(Console.ReadLine(), out option))
                {
                    Console.WriteLine("voer een getal in!");
                }

                switch (option)
                {
                    #region Print Stock
                case 1:
                    Console.WriteLine(BookStore.ListProduct(hengelo.Stocks));
                    break;

                    #endregion
                    #region Generate Order
                case 2:

                    string orderString = BookStore.ListOrders(BookStore.GenerateOrders(hengelo.Stocks));

                    Console.WriteLine(orderString);

                    if (orderString != "")
                    {
                        Order todaysOrder = new Order();
                        todaysOrder.OrderDate    = DateTime.Today;
                        todaysOrder.OrderHandled = false;
                        todaysOrder.OrderList.Add(orderString);

                        OrderItems.OrderList.Add(todaysOrder);
                    }
                    //else
                    //{
                    //    Console.WriteLine("No orders necessary at the moment.");
                    //}


                    break;

                    #endregion
                    #region Sell Book
                case 3:

                    Console.WriteLine("[ 1 ] Sell book by title");
                    Console.WriteLine("[ 2 ] Sell book by ISBN");
                    while (!int.TryParse(Console.ReadLine(), out option))
                    {
                        Console.WriteLine("voer een getal in!");
                    }
                    switch (option)
                    {
                    case 1:
                        Console.WriteLine("Voer de titel in");
                        string titel = Console.ReadLine();

                        Console.WriteLine("Voer de auteur in");
                        string author = Console.ReadLine();

                        Console.WriteLine("Voer het aantal verkochte boeken in");
                        int soldBooks;
                        while (!int.TryParse(Console.ReadLine(), out soldBooks))
                        {
                            Console.WriteLine("voer een getal in!");
                        }
                        hengelo.Stocks = BookStore.SellBookByTitle(titel, author, soldBooks, hengelo.Stocks);
                        BookStore.ListProduct(hengelo.Stocks);
                        break;

                    case 2:
                        Console.WriteLine("Voer de ISBN in");
                        string isbn = Console.ReadLine();

                        Console.WriteLine("Voer het aantal verkochte boeken in");
                        int soldBooks2;
                        while (!int.TryParse(Console.ReadLine(), out soldBooks2))
                        {
                            Console.WriteLine("voer een getal in!");
                        }
                        hengelo.Stocks = BookStore.SellBookByISBN(isbn, soldBooks2, hengelo.Stocks);
                        BookStore.ListProduct(hengelo.Stocks);
                        break;

                    default:
                        break;
                    }



                    break;

                    #endregion
                    #region Add new book or magazine
                case 4:
                    Console.WriteLine("[ 1 ] Add New Book");
                    Console.WriteLine("[ 2 ] Add New Magazine");

                    while (!int.TryParse(Console.ReadLine(), out option))
                    {
                        Console.WriteLine("voer een getal in!");
                    }
                    switch (option)
                    {
                    case 1:
                        string printBook; string isbnBook; int minStockBook; int maxStockBook; int stockBook; string titleBook; string authorBook; int weightBook; decimal priceBook; Language languageBook; Measurement measurementBook;

                        Console.WriteLine("Enter Print: ");
                        printBook = Console.ReadLine();

                        Console.WriteLine("Enter ISBN: ");
                        isbnBook = Console.ReadLine();

                        Console.WriteLine("Enter minimum stock: ");
                        Int32.TryParse(Console.ReadLine(), out minStockBook);

                        Console.WriteLine("Enter maximum stock: ");
                        Int32.TryParse(Console.ReadLine(), out maxStockBook);

                        Console.WriteLine("Enter current stock: ");
                        Int32.TryParse(Console.ReadLine(), out stockBook);

                        Console.WriteLine("Enter Title: ");
                        titleBook = Console.ReadLine();

                        Console.WriteLine("Enter Author: ");
                        authorBook = Console.ReadLine();

                        Console.WriteLine("Pick a language (select number): \n" +
                                          "[ 1 ] Dutch \n" +
                                          "[ 2 ] English \n" +
                                          "[ 3 ] French \n" +
                                          "[ 4 ] German \n" +
                                          "[ 5 ] Spanish \n" +
                                          "[ 6 ] Unknown ");


                        int optionlang;

                        while (!int.TryParse(Console.ReadLine(), out optionlang))
                        {
                            Console.WriteLine("Enter a number from the selection");
                        }

                        switch (optionlang)
                        {
                        case 1:
                            languageBook = Language.Dutch;
                            break;

                        case 2:
                            languageBook = Language.English;
                            break;

                        case 3:
                            languageBook = Language.French;
                            break;

                        case 4:
                            languageBook = Language.German;
                            break;

                        case 5:
                            languageBook = Language.Spanish;
                            break;

                        case 6:
                            languageBook = Language.Unknown;
                            break;

                        default:
                            languageBook = Language.Unknown;
                            Console.WriteLine("No valid number entered, assigning language as \"Unknown\"");
                            break;
                        }
                        ;


                        Console.WriteLine("Enter unit weight (gram): ");
                        Int32.TryParse(Console.ReadLine(), out weightBook);

                        Console.WriteLine("Enter unit price (Euro): ");
                        Decimal.TryParse(Console.ReadLine(), out priceBook);

                        int width4;
                        int length4;
                        int height4;

                        Console.WriteLine("Enter Width (mm): ");
                        Int32.TryParse(Console.ReadLine(), out width4);
                        Console.WriteLine("Enter Length (mm): ");
                        Int32.TryParse(Console.ReadLine(), out length4);
                        Console.WriteLine("Enter Height (mm): ");
                        Int32.TryParse(Console.ReadLine(), out height4);

                        measurementBook = new Measurement(width4, height4, length4);


                        BookStore.AddNewBook(printBook, isbnBook, minStockBook, maxStockBook, stockBook, titleBook, authorBook, weightBook, priceBook, languageBook, measurementBook, hengelo.Stocks);
                        Console.WriteLine(isbnBook + " Added");

                        break;

                    case 2:



                        //Magazine add cod ehier
                        BookstorLibrary.DayOfWeek dayOfRelease; BookstorLibrary.DayOfWeek dayOfOrder; string issnMag; int totalOrderAmountMag; string titleMag; string authorMag; int weightMag; decimal priceMag; Language languageMag; Measurement measurementMag;
                        Console.WriteLine("Enter ISSN");
                        issnMag = Console.ReadLine();

                        Console.WriteLine("Enter amount to order");
                        Int32.TryParse(Console.ReadLine(), out totalOrderAmountMag);

                        Console.WriteLine("Pick a release day");
                        Console.WriteLine("[1 - 5] Days of the week (Monday - Friday)");
                        int optionday;

                        while (!int.TryParse(Console.ReadLine(), out optionday))
                        {
                            Console.WriteLine("Enter a number from the selection");
                        }

                        switch (optionday)
                        {
                        case 1:
                            dayOfRelease = BookstorLibrary.DayOfWeek.Monday;
                            break;

                        case 2:
                            dayOfRelease = BookstorLibrary.DayOfWeek.Tuesday;
                            break;

                        case 3:
                            dayOfRelease = BookstorLibrary.DayOfWeek.Wednesday;
                            break;

                        case 4:
                            dayOfRelease = BookstorLibrary.DayOfWeek.Thursday;
                            break;

                        case 5:
                            dayOfRelease = BookstorLibrary.DayOfWeek.Friday;
                            break;

                        default:
                            dayOfRelease = BookstorLibrary.DayOfWeek.Monday;
                            Console.WriteLine("No valid number entered, assigning day of release as monday");
                            break;
                        }
                        ;

                        Console.WriteLine("Pick the order day");
                        Console.WriteLine("[1 - 5] Days of the week (Monday - Friday)");


                        while (!int.TryParse(Console.ReadLine(), out optionday))
                        {
                            Console.WriteLine("Enter a number from the selection");
                        }

                        switch (optionday)
                        {
                        case 1:
                            dayOfOrder = BookstorLibrary.DayOfWeek.Monday;
                            break;

                        case 2:
                            dayOfOrder = BookstorLibrary.DayOfWeek.Tuesday;
                            break;

                        case 3:
                            dayOfOrder = BookstorLibrary.DayOfWeek.Wednesday;
                            break;

                        case 4:
                            dayOfOrder = BookstorLibrary.DayOfWeek.Thursday;
                            break;

                        case 5:
                            dayOfOrder = BookstorLibrary.DayOfWeek.Friday;
                            break;

                        default:
                            dayOfOrder = BookstorLibrary.DayOfWeek.Monday;
                            Console.WriteLine("No valid number entered, assigning day of release as monday");
                            break;
                        }
                        ;


                        Console.WriteLine("Enter Title: ");
                        titleMag = Console.ReadLine();

                        Console.WriteLine("Enter Author: ");
                        authorMag = Console.ReadLine();


                        Console.WriteLine("Pick a language (select number): \n" +
                                          "[ 1 ] Dutch \n" +
                                          "[ 2 ] English \n" +
                                          "[ 3 ] French \n" +
                                          "[ 4 ] German \n" +
                                          "[ 5 ] Spanish \n" +
                                          "[ 6 ] Unknown ");


                        int optionlang1;

                        while (!int.TryParse(Console.ReadLine(), out optionlang1))
                        {
                            Console.WriteLine("Enter a number from the selection");
                        }

                        switch (optionlang1)
                        {
                        case 1:
                            languageMag = Language.Dutch;
                            break;

                        case 2:
                            languageMag = Language.English;
                            break;

                        case 3:
                            languageMag = Language.French;
                            break;

                        case 4:
                            languageMag = Language.German;
                            break;

                        case 5:
                            languageMag = Language.Spanish;
                            break;

                        case 6:
                            languageMag = Language.Unknown;
                            break;

                        default:
                            languageMag = Language.Unknown;
                            Console.WriteLine("No valid number entered, assigning language as \"Unknown\"");
                            break;
                        }
                        ;


                        Console.WriteLine("Enter unit weight (gram): ");
                        Int32.TryParse(Console.ReadLine(), out weightMag);

                        Console.WriteLine("Enter unit price (Euro): ");
                        Decimal.TryParse(Console.ReadLine(), out priceMag);

                        int widthMag;
                        int lengthMag;
                        int heightMag;

                        Console.WriteLine("Enter Width (mm): ");
                        Int32.TryParse(Console.ReadLine(), out widthMag);
                        Console.WriteLine("Enter Length (mm): ");
                        Int32.TryParse(Console.ReadLine(), out lengthMag);
                        Console.WriteLine("Enter Height (mm): ");
                        Int32.TryParse(Console.ReadLine(), out heightMag);

                        measurementMag = new Measurement(widthMag, heightMag, lengthMag);

                        BookStore.AddNewMagzine(dayOfRelease, dayOfOrder, issnMag, totalOrderAmountMag, titleMag, authorMag, weightMag, priceMag, languageMag, measurementMag, hengelo.Stocks);

                        break;

                    default:
                        break;
                    }

                    break;

                case 5:
                    Console.WriteLine("[ 1 ] Remove Book");

                    Console.WriteLine("[ 2 ] Remove Magazine");


                    while (!int.TryParse(Console.ReadLine(), out option))
                    {
                        Console.WriteLine("voer een getal in!");
                    }
                    switch (option)
                    {
                    case 1:
                        string removeBookIsbn;

                        Console.WriteLine("Enter the ISBN of the book you wish to remove");
                        removeBookIsbn = Console.ReadLine();

                        BookStore.RemoveBookFromStockByISBN(removeBookIsbn, hengelo.Stocks);

                        break;

                    case 2:
                        string removeMagIssn;

                        Console.WriteLine("Enter the ISSN of the magazine you wish to remove");
                        removeMagIssn = Console.ReadLine();

                        BookStore.RemoveMagazineFromStockByISSN(removeMagIssn, hengelo.Stocks);

                        break;

                    default:
                        break;
                    }
                    break;


                    #endregion
                    #region Default
                default:
                    Console.WriteLine("The program will now close");
                    Console.ReadKey();
                    Environment.Exit(0);
                    break;
                    #endregion
                }
            }while (option != 0);

            Console.ReadKey();
        }