runat="server"

[TAREQ F ABUZUHRI]

Using themed css files requires a header control on the page. (e.g. ). Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: Using themed css files requires a header control on the page. (e.g. ).

Palestine

[TAREQ F ABUZUHRI]

how can avoid this Error

Palestine

[Guffa]

Just do what it says. If there is something about the error message that you don't understand, please specify what.

--- single minded; short sighted; long gone;