private void frmProductsRecord_FormClosing(object sender, FormClosingEventArgs e)
 {
     this.Hide();
     frmProduct frm = new frmProduct();
     frm.Show();
 }
 private void productToolStripMenuItem_Click(object sender, EventArgs e)
 {
     frmProduct frm = new frmProduct();
     frm.Show();
 }