I simply cannot create a setter for a collection property. I will break all design principles that I am trying to follow. I am sure that this can be worked around in many different ways instead of adding a setter.
The idea of the article is simple -- each FilterDescriptor object has 4 meaningful properties. Simply read them, store them in some kind of medium of your choice and then do the opposite by reading them, re-creating the FilterDescriptor and adding it to the collection. This RadGridView example
does something similar with the grid's FilterDescriptors which are the same as RadDataFilter's. It should be the same.
I hope this helps.
the Telerik team
Let us know about your Windows Phone 7 application built with RadControls and we will help you promote it. Learn more>>