asp.net mvc - <add assembly="System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> -

I get the following error after opening and compiling my MVC4 project in VS 2010.

CS1705: The assembly uses' SDEM, version = 1.0.0.0, culture = neutral, public keychain = 'zero' system. Web. MVC, version = 4.0.0.1, culture = neutral, public kiton = 31bf3856ad364e35 'which is the higher version than the assembly' System.Web.Mvc, version = 4.0.0.0, culture = neutral, public keycon = 31bf3856ad364e35 '

I have my web.config

  & lt; Add assembly = "System.Web.Mvc, version = 4.0.0.0, culture = neutral, public token = 31BF3856AD364E35" />  

What is a clue to solve this issue's problem?

Indicates that there is a different version (4.0.0.1) in the assembly referenced by you in the project Which you have in web.config (4.0.0.0).

Please refer to the Web assembly referred to System.Web.Mvc. Has been written in the config.

If not in the context of the appropriate assembly, right-click context -> add context -> ...