private void logout_btn_Click(object sender, EventArgs e)
        {
            PackageMenu packageMenu = ObjectHolder.packMenu;

            this.Hide();
            packageMenu.Show();
            packageMenu.runDataGrid();
        }
 private void btnPackage_Click_1(object sender, EventArgs e)
 {
     if (packMenu == null)
     {
         packMenu = new PackageMenu();
     }
     ObjectHolder.inventoryMainMenu = this;
     this.Hide();
     packMenu.Show();
 }