Unable to generate a tempory class (result=1). Error CS2018: Unable to find mesagge file 'cscompui.dll'

This Problem is because of .NetFramework Installation
If you can reinstall .netframework 2.0 it can work
In My case I was working with Application Classifieds Starter Kit and I have dotnet 3.5 Installed on my machine on top of that I can not install 2.0


So I thought to install version 4.0 from as
The .NET Framework 4 works side by side with older Framework versions. Applications that are based on earlier versions of the Framework will continue to run on the version targeted by default


Download and install the latest .net framework, see the link below:
http://msdn.microsoft.com/en-us/netframework/aa569263.aspx


Now it works

Could not load type 'System.Web.UI.ScriptReferenceBase'

Server Error in '/' Application.

Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

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.TypeLoadException: Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'




Solution :  Install Microsoft 3.5 sp1 from the below link

http://www.microsoft.com/downloads/details.aspx?FamilyID=AB99342F-5D1A-413D-8319-81DA479AB0D7&displaylang=en