private void btnRemovePerson_Click_1(object sender, EventArgs e)
 {
     IService service = new ServiceClient();
     if (dgvPersons.SelectedRows.Count == 1)
     {
         string userName = dgvPersons.CurrentRow.Cells[1].Value.ToString();
         if (userName != ItemPanel.CurrentShoppingList.OwnerUserName)
         {
             dgvPersons.Rows.Remove(dgvPersons.CurrentRow);
             service.RemovePersonRelation(userName, ItemPanel.shoppingListID);
         }
     }
 }