Object Factories with Lazy Loading in C#

Question

I'm looking for a lazy loading solution in c#. The idea is, to have a kind of object factory, which will be responsible for creating my entity objects. When a property of such an object is accesed and it is not yet loaded, the factory (or a magic watcher) will be able to pause the execution flow for a while (maybe that step is not necessary) load the missing data (don't know how to specify, from where to load that data----maybe via attributes) and return to the flow. My entity objects, do not have a possibility to load the missing data by themselves, because they are only data containers having private members, which are accessible via public properties. These objects need to be filled with their data from outside, and therefore many lazy loading solutions won't work here. Maybe anyone of you knows the solution for my problem? Thank You in advance! Greetz! cyberjoe