I try this:
PlayMusic = new MediaElement();
PlayMusic.AudioCategory = Windows.UI.Xaml.Media.AudioCategory.Media;
PlayMusic.Source = new Uri(@\"C:\\Users\\Us
Put mySong.mp3 in your Assets folder. Then in Visual Studio, right click on your Assets folder and select "add existing item". Add mySong.mp3 FROM your Assets folder. In XAML, add a player:
In c#, mySong.mp3 will play when you set the source:
Uri newuri = new Uri("ms-appx:///Assets/mySong.mp3");
myPlayer.Source = newuri;