'System.Web.Administration.WebAdminRemotingManager' in Assembly
'App_Code.1hpl8upp

Everytime I click the ASP Configuration button with VS2K5 this ERROR-RIDDEN
file is created in the
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET
Files\asp.netwebadminfiles\9d4caaa4\c2ae7372 directory; regardless of
whether I'm in a new project or old.

Does anyone know if I'm going to have to uninstall and reinstall Visual
Studio to rid myself of this problem:
('System.Web.Administration.WebAdminRemotingManager' in Assembly
'App_Code.1hpl8upp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
is not marked as serializable.]),

which creates this error: Unable to serialize the session state. In
'StateServer' and 'SQLServer' mode, ASP.NET will serialize the session state
objects, and as a result non-serializable objects orMarshalByRef objects are
not permitted. The same restriction applies if similar serialization is done
by the custom session state store in 'Custom' mode.

Thanks.