Rotate a Label Text

Display Vertically rotated text on a server side label ASP.NET or in a HTML control

<asp:Label id="lblTotate" style="writing-mode:tb-rl" runat="server">your text here</asp:Label>

For more reference:

http://www.w3.org/TR/2001/WD-css3-text-20010517/

http://msdn.microsoft.com/en-us/library/ms531187.aspx