private void Place_Order_button_Click(object sender, EventArgs e)
{
// open order window
// hide main form
this.Hide();
// show other form
var Books = new BookStoreForm();
Books.RefToForm1 = this;
Books.ShowDialog();
}
private void bookStoreToolStripMenuItem_Click_1(object sender, EventArgs e)
{
BookStoreForm bookStore = new BookStoreForm();
bookStore.ShowDialog();
}