Common Issues & Solution

• How to upgrade from old version of MVC

  • Remove System.Web.MVC from Solution

  • Change the .NET Framework version to 4.6

  • Install MVC 5.11

    Install-Package Microsoft.AspNet.Mvc -Version 5.1.1
    

  • Modify Razor Version

    I am using VS2013, MVC 5.2.2.0, Web Api 2. I have just changed the all versions from 2.0.0.0 to3.0.0.0 of the following section of Web.config resides inside the View folder of my project.

    <configSections>
    <sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
    <section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
    <section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" />
    </sectionGroup>
    

    ​

• Conflicting versions of ASP.NET Web Pages detected: specified version is "1.0.0.0", but the version in bin is "3.0.0.0".

// web.config
<configuration>
    <appSettings>
      <add key="webpages:Version" value="3.0.0.0"/>
      <add key="ClientValidationEnabled" value="true"/>
      <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
    </appSettings>
    ...
</configuration>