VS Project References Broken On Case Sensitivity of GUID

Question

Since upgrading to VS 2015, my team has experienced random quirky things which I\'m sure are being worked out at Microsoft right now. One pretty annoying one is that we see

Answer 1

There's a bug in the projectsystem it seems. This powershell will loop over projects and make all references upper case:

#FixGuids

get-childitem -recurse | ?{ @('.sln', '.csproj', '.vbproj') -contains $_.Extension } | %{
   [regex]::Replace((gc -raw $_.FullName), '[{(]?[0-9A-Fa-f]{8}[-]?([0-9A-Fa-f]{4}[-]?){3}[0-9A-Fa-f]{12}[)}]?', { return ([string]$args[0]).ToUpperInvariant() }) |
      Out-File $_.FullName -Encoding "UTF8
}

It's quite simplistic. If you rely on guids in your projects for something other than references, you may want to turn it into something more intelligent.