private void editActivity()
        {
            ClsActivity lcActivity = (ClsActivity)lstActivityLog.SelectedItem;

            if (lcActivity != null && lcActivity.ViewEdit())
            {
                updateActivityList();
            }
        }
        private void btnAddActivity_Click(object sender, EventArgs e)
        {
            ClsActivity lcActivity = ClsActivity.NewActivity(cboActivitySelection.SelectedIndex, _Vehicle);

            if (lcActivity != null && lcActivity.ViewEdit())
            {
                _Vehicle.ActivityList.Add(lcActivity);
                updateActivityList();
            }
        }