TaskAwaiter does not implement INotifyCompletion When Using Visual Studio 2015

I faced with this issue today, I think it may helps to someone: Microsoft.CompilerServices.AsyncTargetingPack is deprecated, but there is another package

https://www.nuget.org/packages/Microsoft.Bcl.Async

I've removed this from the project, and now everything is fine.

I finally found the issue. This nuget package was installed

https://www.nuget.org/packages/Microsoft.CompilerServices.AsyncTargetingPack/1.0.1

That was there to support older version of Visual Studio. I remove this and everything works.

I wasted way too much time on this one...