private void listBooksMenu_Click(object sender, EventArgs e)
{
booksListForm = new BooksListForm(this);
booksListForm.MdiParent = this;
booksListForm.FormClosing += (send, ev) => { childViewClosing(send as Form, ev); };
++openViewsCount;
booksListForm.Show();
}
public MainForm()
{
InitializeComponent();
booksCollection = new BooksCollection();
booksListForm = new BooksListForm(this);
booksListForm.WindowState = FormWindowState.Maximized;
booksListForm.FormClosing += (sender, e) => { childViewClosing(sender as Form, e); };
currentView = booksListForm;
booksListForm.RegisterForItemCountChanges(UpdateStatusBar);
openViewsCount = 1;
MdiChildActivate += setStatusBarSource;
booksListForm.Show();
}