private void PopulateActivityTypeSelector()
        {
            string errorMessage = String.Empty;

            List <ActivityType> actTypes = Controller.GetActivityTypeList(out errorMessage);

            if (String.IsNullOrEmpty(errorMessage))
            {
                ActivityTypeSelector.DataSource    = actTypes;
                ActivityTypeSelector.DisplayMember = "Name";
                ActivityTypeSelector.ValueMember   = "ActivityTypeID";
            }
            else
            {
                MessageBox.Show(errorMessage);
            }
        }