ASP.NET IIS7.5分析器错误

I have a production system and test system, both running IIS. IN the production system, everything runs fine. In the test system, I have a directed copy of the folder the site code is contained in which is set up as a virtual directory. The App_Code folder is in the root and contains all the .cs files. When running the same site in test, I get a I have a production system and test system, bot