I installed the Visual Studio 11 Premium beta on a machine that already has a Visual Studio 2010 Premium installation. I opened an existing VS 2010 solution file, and it converted successfully and was able to build. However, when I tried the "Run Code Analysis on Solution" feature, I received a number of error messages such as:
CA0053 Error Running Code Analysis CA0053 : Unable to load rule assembly 'c:\program files (x86)\microsoft visual studio 10.0\team tools\static analysis tools\fxcop\rules\reliabilityrules.dll': Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
This error message occurred for 14 DLLs, including portabilityrules.dll, performancerules.dll, and securityrules.dll. The path above exists, and it contains the DLLs, but since it is running VS11 I am surprised that it was not looking in the corresponding "...\microsoft visual studio 11.0\..." directory.
However, the code analysis did run and generate some valid warnings despite these errors.