Could not load file or assembly System, Version=2.0.5.0 in .NET 4 MVC 4 application

Question

Been searching for ages, can\'t find anything helpful. Here is the exception I\'m getting:

Could not load file or assembly \'System, Version=2.0.5.0, Culture         


        

Answer 1

Make sure your .NET framework is patched. Microsoft released patches to .NET to allow Portable Class Libraries to properly find the appropriate runtime (KB2468871). If you are seeing the above exception (or something like it), it means you're missing the latest .NET framework patches.