I worked with LINQ quite a bit. Right now I have List<CustomObject> that is bound to my LLSelector. I was able to achieve the search function. But i am keeping one actual list and then create a small list out of it based on the search criteria and set that as Item Source. I thought from a smart device perspective may be I am not doing this the right way. for ref, List<CustomeObject> I get from a web api call.
I have checked out on StackOverflow, but couldn' find anything diff.