How do I store multiple results from a stored procedure into a dataset?

How do I combine to result sets from a StoredProcedure into one dataset in ASP.NET?

Below is my code in asp.net

SqlDataAdapter adap = new System.Data.SqlClient.SqlDataAdapter("sp_Home_MainBanner_TopStory",con);
adap.SelectCommand.CommandType = CommandType.StoredProcedure;
adap.SelectCommand.Parameters.AddWithValue("@rows", 9);

DataSet DS = new DataSet();

adap.Fill(DS, "Table1");
adap.Fill(DS, "Table2");

GridView1.DataSource = DS.Tables["Table2"];
GridView1.DataBind();

Even if there were two adapters, how could I combine the results into one dataset?