Adding 2 columns on datagridview

Question

Hi.
I am showing a column on a datagridview. The codes are below;

DataTable table_nmrlr = new DataTable();
adapter_nmrlr.Fill(table_nmrlr);
...
dataGridView3.DataSource = table_nmrlr;

First column has 10 row. Then I want to show another column on datagridview on under the other. I mean the second column must start at 11.th row. But I couldnt do this. There should be 2 column on the same datagridview's column. How can I do this?