1-) Asp.Net -  gridview multiline yapma

1-)gridview multiline yapma

<asp:GridView OnSelectedIndexChanged="grid_mail_listele_SelectedIndexChanged" PageSize="6" AllowPaging="True"  ID="grid_mail_listele" runat="server" CellPadding="5"  Width="900px" ForeColor="#333333" GridLines="None"  CellSpacing="5" Font-Size="Smaller">

               <AlternatingRowStyle BackColor="White"></AlternatingRowStyle>

</asp:GridView >