protected void cleanup(Northwind db)
 {
     try
     {
         // Get the name of the Order Details table properly evaluating the Annotation
         string tableName = null;// db.Vendor.GetSqlFieldSafeName("order details"); //eg. "[Order Details]"
         foreach (object obj in typeof(OrderDetail).GetCustomAttributes(true))
         {
             if (obj is System.Data.Linq.Mapping.TableAttribute)
             {
                 tableName = ((System.Data.Linq.Mapping.TableAttribute)obj).Name;
             }
         }
         string sql = string.Format("DELETE FROM {0} WHERE Quantity={1}", tableName, TestQuantity);
         db.ExecuteCommand(sql);
     }
     catch (Exception)
     {
     }
 }