### azure

#### Where is Microsoft.WindowsAzure.Diagnostics?

Project references to the various parts of the Azure SDK should live in the installation of the Azure SDK, but for some odd reason my code (an Azure Mobile Service) can no longer see Microsoft.WindowsAzure.Diagnostics:
I should be able to pick the Microsoft.WindowsAzure.Diagnostics.dll up from my Azure SDK 2.7 installation, but here's what I see in the SDK's 'ref' directory:
I.e. I just have
Microsoft.WindowsAzure.ServiceRuntime.dll
WindowsAzureEventSource.dll
WindowsAzureTelemetryEvents.dll
but I do not have Microsoft.WindowsAzure.Diagnostics.dll. Interestingly there is an NuGet package called Unofficial.Microsoft.WindowsAzure.Diagnostics, with over 30,000 downloads, which suggests that I am not the only one having this problem.
Where should I reference Microsoft.WindowsAzure.Diagnostics from; is it a DLL somewhere in an SDK or in a NuGet package; where is it?

You can find it here: C:\Program Files\Microsoft SDKs\Azure\.NET SDK\v2.7\bin\plugins\Diagnostics. With SDK version 2.5, diagnostics is now a plugin.

It's not in C:\Program Files\Microsoft SDKs\Azure\.NET SDK\v2.7\ref, but is in
C:\Program Files\Microsoft SDKs\Azure\.NET SDK\v2.7\bin\plugins\Diagnostics\Microsoft.WindowsAzure.Diagnostics.dll
It was a simple matter of removing the stale reference and re-adding it through the Reference Manager:

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