title: How to get a list of songs, artists, albums on WP7 devices?
body: <p>I want to create a simple audio player for Windows Phone 7.
  How can I get a list of songs, artists, albums, genres and method to play item which i selected ? something like is in native wp7 app "Music+Videos"</p>
  
  <p>second problem: 
  I downloaded "Music + Videos Hub Sample" from <a href="http://msdn.microsoft.com/en-us/library/ff431744%28VS.92%29.aspx#BKMK_Media" rel="nofollow">Code samples</a>, I execute this project and it play some song, display title and coverart of song BUT...
  when I copy this code, add references etc to my project then not display coverart and display title of song, why?</p>
  
  <p>Where i can find more samples of media player for wp7?</p>