There seems to be an issue in FsCsMvc41WebApp.fsproj, as it has a GAC reference to MVC:
<Reference Include="System.Web.Mvc, Version=220.127.116.11, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
Instead, it needs to have a NuGet reference, as in FsCsMvc41Web.csproj:
<Reference Include="System.Web.Mvc, Version=18.104.22.168, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
The causes the build to break when MVC4 is not in the GAC. See this thread for reference: https://github.com/projectkudu/kudu/issues/137
Hmmm, along the same line but not quite the same: the fsproj has a reference to ..\..\packages\System.Net.Http.2.0.20710.0, but it doesn't look like that NuGet package actually gets installed. Same for the other System.Net.Http.* packages.
Also, interestingly, the F# project doesn't have a packages.config at all, but seems to rely on the packages that came with the C# proj.
For some reason, when I programmatically install the packages in the F# projects the references are not added the same way that they are in the C# web project. Any thoughts as to why that would be?
As a work around, I've added the references and packages.config file via a typical project template approach. This is certainly a hack, but it allows the references to be correct in the .fsproj files and appears to also allow the NuGet update/uninstall/etc functionality to work as expected.
I used whatever version was in Nuget yesterday for my blog post, and all I had to do was target the F# project at .NET 4.5. Is 4.5 the intended target? http://sireel-world.azurewebsites.net/sir-eel-visions/WATK-FS-Pt2
It should show up under Visual F# | ASPNET with the name "F# and C# Web Application (ASP.NET MVC 4)". Check the installed extensions (Tools | Extension Manager...) and verify that this extension is enabled.