Refreshing Entities from the data store

I've got an object being passed into a webservice, so it has no state. I know I can iterate through the fields using StateEntry and mark them all as modified and a few other ways, but I wanted to see if refresh would do the trick.

I check the currentvalue and originalvalue of a particular property before doing a refresh.

As expected, they both have the value of the incoming property... e.g. "Julie was here".

Then I do a refresh using ClientWins.

When I check the currentvalue and originalvalue of that particular property after the refresh they are both null (server has a null value).

I expected this to make original value null and leave the current value as "Julie was here" .

I understand that this won't modify the state , but was curious why the current value was overwritten.

thanks