Hi Kumar,
Thanks for your using Syncfusion products. We have added support for serialization in Silverlight GridDataControl in 8.4.0.10. Please find the sample for Silverlight GridDataControl serialization in your dashboard or from the online sample as follows.
Sample Link:
http://samples.syncfusion.com/silverlight/8.4.0.10/default.aspxLet us know if any queries.
Thanks
Kamal.