Is there a library to get/set property from a string (xpath or Property Path)

Question

I am looking for a way to use a string instance path or xpath expression to get/set property values very similar to what wpf does with it's data binding. Do you know of a library for this? I found ObjectXpathNavigator but I am not sure if there is something a little more active out there.

Get("Person.FirstName"); Set( "Person/LastName", value);