Thank you!

I am able to run my project after doing this the steps below from the release notes, but I still get the message stating: "The Web project 'MvcApplication1' requires missing web components to run with Visual Studio. Would you like to download and install them using the Web Platform Installer now?"

At least I can run my project now though so many thanks!!!

• Installing ASP.NET MVC 4 Beta breaks ASP.NET MVC 3 RTM applications.ASP.NET MVC 3 applications that were created with the RTM release (not with the ASP.NET MVC 3 Tools Update release) require the following changes in order to work side-by-side with ASP.NET MVC 4 Beta. Building the project without making these updates results in compilation errors.

  Required updates

  1. In the root Web.config file, add a new <appSettings> entry with the key webPages:Version and the value 1.0.0.0.

  <appSettings>
      <add key="webpages:Version" value="1.0.0.0"/>
      <add key="ClientValidationEnabled" value="true"/>
      <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
  </appSettings>

  1. In Solution Explorer, right-click the project name and then select Unload Project. Then right-click the name again and select Edit ProjectName.csproj.
  2. Locate the following assembly references:

     <Reference Include="System.Web.WebPages"/> 
     <Reference Include="System.Web.Helpers" />

     Replace them with the following:

     <Reference Include="System.Web.WebPages, Version=1.0.0.0,
     Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL "/> 
     <Reference Include="System.Web.Helpers, Version=1.0.0.0,
     Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />

  3. Save the changes, close the project (.csproj) file you were editing, and then right-click the project and select Reload.