public void EditBook(int id)
{
Book book = BooksModel.GetBook(id);
Window window = GetWindow(500, 600);
BookFormViewModel formViewModel = new BookFormViewModel();
formViewModel.Id = book.Id.Value;
formViewModel.Author = book.Author;
formViewModel.Title = book.Title;
if (book.Cover != null)
{
formViewModel.ImageSource = BooksModel.GetCoverFromBytes(book.Cover);
}
formViewModel.closeWindow = closeWindow;
window.Content = formViewModel;
window.ShowDialog();
LoadBooks();
}