public AddItemWindow(Catalog prod, MainWindow mw)
 {
     InitializeComponent();
     Product = prod;
     this.mw = mw;
     ProductNameLb.Content = prod.ProductName;
     ItemDescriptionTb.Text = prod.FullDescription;
 }
 public FindCustomerWindow(MainWindow mw)
 {
     InitializeComponent();
     customerManager = new CustomerManager();
     mainWindow = mw;
 }