Commented Issue: Installing v2 of the Microsoft.AspNet.Webpages NuGet package fails to remove the webPages:Version appSetting if it exists [438]

1. Create a Razor v1 web site
2. Open web.config and add the following entry in <appSettings />.

<add key="webPages:Version" value="1.0.0.0" />

3. Open the NuGet package manager and install version 2 of the package Microsoft.AspNet.Webpages.

Result: In web.config, the app setting isn't updated to 2.0, even as the assembly references are. If you attempt to build the site, compilation will fail with multiple errors of the form

The type 'System.Web.WebPages.HelperPage' exists in both 'c:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Web.WebPages\v4.0_2.0.0.0__31bf3856ad364e35\System.Web.WebPages.dll' and 'c:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Web.WebPages\v4.0_1.0.0.0__31bf3856ad364e35\System.Web.WebPages.dll' c:\Users\fwtlaba\AppData\Local\Temp\Temporary ASP.NET Files\school\37312387\916963f9\App_Code.np9dbukn.8.cs

Expected: We should transform web.config to update the webpages:Version setting as well.
Comments: The version number here has already been improved, it now says: Conflicting versions of ASP.NET Web Pages detected: specified version is "1.0.0.0", but the version in bin is "2.0.0.0". To continue, remove files from the application's bin directory or remove the version specification in web.config. #2 looks to be possible with an upcoming version of NuGet.