How to set first row color to gridview in c#

protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e)

  {

      try

       {

                if (e.Row.RowIndex == 0)

                {

                    e.Row.BackColor = System.Drawing.Color.YellowGreen;

                }

       }

       catch (Exception ex)

       {

          lbl_error.Visible = true;

          lbl_error.ForeColor = System.Drawing.Color.Red;

          lbl_error.Text = ex.Message;

              

       }

  }