How to use SqldataAdapter with DataGridView

I came across a project from years ago that uses Datatable and DataSet, predefines the DataTable with DataColumns, and populates it using a SqlDataAdapter and SqlCommandBuilder.

Thing is, when I load the dataset, the DGV shows empty columns from the DataColumns definitions, and then shows the same columns all over again as they came from the SqlDataAdapter.

In other words, all the columns are duplicated.

I can't seem to remember what I did years ago to show just the one set of columns, not both.

Any thoughts?

Thanks for any response!