The resulting table has a border around the outside, but not the interior between cells.
Table t = new Table();
t.Border = new BorderInfo(BorderSide.All);
Row r;
r = t.Rows.Add();
r.Cells.Add("cell 1:1");
r.Cells.Add("cell 1:2");
r = t.Rows.Add();
r.Cells.Add("2:1");
r.Cells.Add("2:2");
Why no interior borders?
Thanks!