I have seen examples where you can pass parameters between aspx and silverlight app as well as how to pass simple values back to aspx.
Is it possible to pass generic types such as list collections from a silverlight app to a asp.net page to be picked up. I have looked at serialization but not sure if this is the best approach due to performance?
Thanks in advance
Since Silverlight is client-side and ASP.Net is server-side, you will need to use serialization in order to pass objects between the two.
I would consider using the DataContractSerializer in Silverlight to serialize the object as XML. You can then push the XML up any way you want: ASPX web service, WCF service, HTTP PUT, Hidden fields in the HTML, etc.