private void manageVehicleListingToolStripMenuItem_Click(object sender, EventArgs e) { var OpenForms = Application.OpenForms.Cast <Form>(); var IsOpen = OpenForms.Any(q => q.Name == "ManageVehicleListing"); if (!Utils.FormIsOpen("ManageVehicleListing")) { var VehicleListing = new ManageVehicleListing(); VehicleListing.MdiParent = this; VehicleListing.Show(); } }