title: how run a video from folder`s Video in my project in WPF,not out of project?
body: <p>i have a project WPF,i want run a video.i success run a video,but i want to address within project,rather than outside,
  For example,i want:  </p>
  
  <pre><code>    &lt;MediaElement Name="redangVideo" Source="Videos\clip.avi" LoadedBehavior="Manual" /&gt; 
  </code></pre>
  
  <p>not:  </p>
  
  <pre><code> &lt;MediaElement Name="redangVideo" Source="C:\path_file\Videos\clip.avi" LoadedBehavior="Manual" /&gt;     
  </code></pre>