private void managePlanToolStripMenuItem_Click(object sender, EventArgs e)
        {
            AddEditPlan addEditPlan = new AddEditPlan();

            addEditPlan.ShowDialog();
        }
        private void bt_ManagePlan_Click(object sender, EventArgs e)
        {
            AddEditPlan addEditPlan = new AddEditPlan();

            addEditPlan.ShowDialog();
        }