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I am using a Parallel.ForEach loop in C# / VS2010 to do processing and I have a couple of questions. First of all I have a process that needs to extract information from a remote webservice and then needs to build images (GDI) on the fly. I have a class that encapsulates all of the functionality into a single object with two main methods Load() and CreateImage() with all the GDI management / WebRequests "blackboxed" inside this object. I then create a GenericList that contains all the objects that need to be processed and I iterate through the list using the following code: try { Parallel.ForEach(MyLGenericList, ParallelOptions, (MyObject, loopState) => { MyObject.DoLoad(); MyObject.CreateImage(); MyObject.Dispose(); if (loopState.ShouldExitCurrentIteration || loopState.IsExceptional) loopState.Stop(); }); } catch (OperationCanceledException ex) { // Cancel here } catch (Exception ex) { throw ex; } Now my questions are: Given that there could be ten thousand items in the list to parse, is the above code the best way to approach this? Any other ideas more then welcome I have an issue whereby when I start the process the objects are created / loaded and images created very fast but after around six hundred objects the process starts to crawl. It doesn eventually finish, is this normal? Thanks in advance :) Adam

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