Today I decided to get OWIN up and running on Orchard. Sebastien had done the leg work, I just needed to get it compiling, update the DLL packages for Owin, and get those unit tests running. Fantastic, not hard... but hang on!! What's this error!
No owin.Environment item was found in the context
After lots of googling, it appears that this error will only occur if the Owin Startup class is not called.
I fire up IIS Express, and hey presto, it works, Orchard kicks up, so the issue is IIS!
So I cleared my cache, deleted dependencies, cleaned, rebuilt, still issues.... ultimately, its the ASP.Net temporary files that are going to kick ya. Just do this...
Run this in PowerShell
net stop w3svc Remove-Item -Path "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\*" -Force -Recurse Remove-Item -Path "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\*" -Force -Recurse net start w3svc