title: Which Silverlight ArcGIS SDK link to use?
body: <p>I am confused as to which ArcGIS SDK I should use for developing a ArcGIS map-based Silverlight application.</p>
  
  <p>I just signed up and downloaded the SDK isntaller from ESRI:
  <a href="http://help.arcgis.com/en/webapi/silverlight/index.html" rel="nofollow">http://help.arcgis.com/en/webapi/silverlight/index.html</a></p>
  
  <p>But then i noticed that Codeplex has their own SDK:
  <a href="http://esrisilverlight.codeplex.com/" rel="nofollow">http://esrisilverlight.codeplex.com/</a></p>
  
  <p>Which SDK should I be using? Or are both the same (i doubt this)?</p>
  
  <p><strong>* UPDATED *</strong></p>
  
  <p>Or should I just go with the Silverlight Bing Maps API???</p>