How to merge two tables and displayed in single grid view?

code in .aspx page:

drag and drop single grid view.

code in .aspx.cs page:

public partial class Mergegridview : System.Web.UI.Page
{
    string strcon = ConfigurationManager.ConnectionStrings["sqlconn"].ConnectionString;
    protected void Page_Load(object sender, EventArgs e)
    {
        binddata();

    }
    public void binddata()
    {
        SqlConnection con = new SqlConnection(strcon);
        SqlDataAdapter da1 = new SqlDataAdapter("select * from stu",con);
        SqlDataAdapter da2 = new SqlDataAdapter("select * from stu1", con);
        DataSet ds1 = new DataSet();
        DataSet ds2 = new DataSet();
        da1.Fill(ds1,"Record");
        da2.Fill(ds2,"Record");
        ds1.Merge(ds2);
        GridView1.DataSource = ds1;
        GridView1.DataBind();
    }
}