title: Make correct URI for WP Game Library
body: <p>I am trying to create a library with sounds in it, but I cant get the URIs to work, if I use a online uri like</p>
  
  <pre><code>new Uri("http://www.archive.org/download/BrahmsViolinConcerto-Heifetz/03Iii.AllegroGiocosoMaNonTroppoVivace.mp3")
  </code></pre>
  
  <p>it works fine, so the issue is linking correctly to my folders in my project</p>
  
  <p>My in my WP Game Librarys folder I have \Sounds\letters and in that folder is a sound named a.wma</p>
  
  <p>My Method for loading this is </p>
  
  <pre><code>public void PlayLetter(string letter)
      {
          try
          {
              Initialize();
              FrameworkDispatcher.Update();
              var uri = new Uri(@"/Sounds/letters/" + letter + ".wma", UriKind.Relative);
              var song = Song.FromUri("sound", uri);
              MediaPlayer.Play(song);
          }
          catch(Exception e)
          {
              Console.WriteLine(e.ToString());
          }
      }
  </code></pre>
  
  <p>And I of course give it string "a" as a parameter when it fails</p>
  
  <p>I have also included the sound file in my project like</p>
  
  <p><img src="https://i.stack.imgur.com/yBdiU.png" alt="enter image description here"></p>
  
  <p>I just get a </p>
  
  <blockquote>
    <p>A first chance exception of type 'System.InvalidOperationException' occurred in Microsoft.Xna.Framework.dll</p>
  </blockquote>
  
  <p>But its an uri problem I am certain as I tried a online URI that worked just fine</p>
  
  <p>Also I am in doubt of 2 things, is MediaPlayer the right thing to use in a game? And can a library play sounds (Or even contain them)</p>