Thanks,
Bill

foreach (DataRow dr in this.CurrentDataTable.Rows)
{
    if (this.RequiredQty = 0)
    {
        this.CurrentRow.Delete();
    }
}

I would run this immediately after I perform the FillDataTable method on the BO.  The Delete method would only delete the row from the CurrentDataTable...it wouldn't mark it for deletion and drop it from the database, right?

I could see an initial speed hit at the time of filling the BO, but not when the user is performing their own sorts, groupings and such on the corresponding DX datagrid.  Would this work?

Thanks,
Bill

Yes, but this will also make the BO dirty and if you do not want the table to be updated back at the server, you will have to AcceptChanges on the CurrentDataTable...otherwise this will be deleted from the server if a Save() is called: