private void awardGrid_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            var column = dgv_Awards.Columns[e.ColumnIndex];
            Func <Award, object> orderBy = null;

            switch (column.Name)
            {
            case nameof(Award.Title):
                orderBy = a => a.Title;
                break;

            case nameof(Award.Description):
                orderBy = a => a.Description;
                break;

            default:
                return;
            }

            dgv_Awards.DataSource = null;

            if (Sort == SortOrder.Asc)
            {
                Sort = SortOrder.Desc;
                dgv_Awards.DataSource = awardBL.SortByAsc(orderBy);
            }
            else
            {
                Sort = SortOrder.Asc;
                dgv_Awards.DataSource = awardBL.SortByDesc(orderBy);
            }

            dgv_Awards.Columns["Id"].Visible = false;
        }