Save/Load Settings
You can save and load settings of RadGridView using the PersistenceFramework.
For the purpose, you need to create and register a custom property provider and persist the complex settings you require (such as filter, sort and group descriptors) as by default, the PersistenceManager can only save and load properties which are of a primitive, UIElement or IEnumerable type. More information on the matter can be found in this article.
Good examples on how to achieve this requirement can be found in the "GridView Serialization" demos in the Silverlight examples application and in our SDK Samples Browser.