private void button2_Click(object sender, EventArgs e)
        {
            int quantity = int.Parse(SPQtyTextBox.Text);
            Job job      = new Job(5, "Maintenance", "Washing Car", DateTime.Now, vehicle, quantity, 300, 1);

            JobCL.Insert(job);
            OilCL.Update();
            this.Close();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            int quantity = int.Parse(OilQtyTextBox.Text);
            Job job      = new Job(4, "Oiling", "Oiling Car", DateTime.Now, vehicle, 450, quantity, 3);

            JobCL.Insert(job);
            OilCL.Update();
            this.Close();
        }