Hello fruitbat,

It is not possible to use a WPF control in a Silverlight application. The controls for those platforms are different, although they are similar. There is a xamWebChart, which I similar to WPF’s xamChart. Here you can read more about our xamWebChart:

http://help.infragistics.com/NetAdvantage/Silverlight/2011/1/CLR4.0/?page=xamWebChart.html

Please note, we are making efforts to ensure all posts are addressed by an Infragistics expert. We believe that the other community members could benefit from this thread as well.

Feel free to write me if you need further assistance.