[smeehrrr]

first of all the item used inside the function IS a copy of the item passed to it, (unless specified by the ref keyword - there's no way to modify the actual item passed as i'm not using any pointers at all and all code is purely .NET if you don't have to specify ref when passing the item then its not going to modify the origional item, - unless the scraperxml code has been modified in someway on your part) and shouldnt be modifying your cached copy. secondly there's absolutely nothing inside the code that should make it copy anything to your cached copy of the item, the ref'd item is only internal as it has to be passed to another internal function - i don't really see how this could be causing problems in your code, and i can't tell anything having not seen the code you're using to pass it - granted i'm only an amateur program (very amateur) but i unless you've made some modifications to the scraperxml code that i don't know about it shouldn't really be doing what you say its doing

ScraperResultsItem is a reference type, not a value type. So if you pass it to a function and then modify one of its fields, the field remains modified when you return from the function. Check http://msdn.microsoft.com/en-us/library/...s_example4 for a good example of this.

You're right, though, in that adding the ref keyword won't really address this problem. The only way to fix it is to explicitly copy the object instead of modifying the one that's passed in.

You should be able to reproduce this fairly easily. Get a ScrapeResultsItem using IMDB, make a call into GetMovieDetails, then examine the contents of the item you passed in. It will be different.