public ProductEditForm(Product product, User user, ProductsForm productForm)
{
InitializeComponent();
this.product = product;
this.user = user;
this.productForm = productForm;
}
private void productListToolStripMenuItem_Click(object sender, EventArgs e)
{
var childForm = new ProductsForm(user);
childForm.MdiParent = this;
childForm.Text = "Products";
childForm.Show();
}