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protected void gvQuestion_RowCreated(object sender, GridViewRowEventArgs e)

    {

          if (e.Row.RowType == DataControlRowType.Header)

          {

               GridViewRow rowHeader = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal);

               rowHeader.BackColor = System.Drawing.Color.White;

               rowHeader.Font.Bold = true;

               TableCellCollection cells = e.Row.Cells;

               rowHeader.Cells.Add(CreateNewHeaderCell("",2));

               rowHeader.Cells.Add(CreateNewHeaderCell("Text1", 2));

               rowHeader.Cells.Add(CreateNewHeaderCell("Text2", 3));

               rowHeader.Visible = true;

               gvQuestion.Controls[0].Controls.AddAt(0, rowHeader);

         }

    }

    private TableCell CreateNewHeaderCell(string cellText, int columnSpan)

    {

       TableCell headerCell = new TableCell();

       headerCell.Text = cellText;

       headerCell.ColumnSpan = columnSpan;

       headerCell.HorizontalAlign = HorizontalAlign.Center;

       return headerCell;

    }