Media Player in Android (VS) error

I tried to follow the Xamarin Play Audio Recipe but using a Duck.wave file instead of test.mp3

I have the line: _player = MediaPlayer.Create(this, Resource.Raw.Duck);

But get an error: 'PetSounds.Android.Resource' does not contain a definition for 'Raw'_

Note: PetSounds.Android is the name of the project

Could the problem be that I am not adding the wave file or raw folder to the Resources correctly? How do I fix my problem???