Gets or sets the current track for this application, whether the application is currently playing or not.
Assembly: Microsoft.Phone (in Microsoft.Phone.dll)
When the is set, existing audio playback is stopped for the current application. If another application's queue is playing, it is not stopped.
Setting or changing the does not start playback. To start playback of the track, call Play().
Setting the to null clears the queue.
Volume settings may not be retained in background audio player applications. This can occur if you set the Volume property first and then call the Play() method and then set the property. To resolve this issue, always set the track before calling the Play method.