created a simple vs 2008 project and targeted .net 3.5. I put a simple grid on a page and used and llblgen2 datasource.. but I keep getting this error..

Compiler Error Message: CS0433: The type 'SD.LLBLGen.Pro.ORMSupportClasses.DataSourceDataContainerType' exists in both 'c:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\cad24ae2\e6555292\assembly\dl3\2ad17881\00f6af42_c514c801\SD.LLBLGen.Pro.ORMSupportClasses.CF20.DLL' and 'c:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\cad24ae2\e6555292\assembly\dl3\73755c79\009c4d40_c514c801\SD.LLBLGen.Pro.ORMSupportClasses.NET20.DLL'

I cleaned out the temp asp.net folder but keeps poping up..

also running llbl 2.5.. don't have 3.5 as a target option though..

You have BOTH dlls in the bin folder of the application. Perhaps due to a wrong reference set earlier. This means that when you compile, VS.NET will copy BOTH files over to the temp folder which makes it clash. Clean the bin folder and then try again.