Why isn't Parallel.ForEach running multiple threads?

Question

Today i tried do some optimization to foreach statement, that works on XDocument.

Before optimization:

foreach (XElement el         


        

Answer 1

Yes exactly, Document.Load(...) locks the file and due to resource contention between threads, TPL is unable to use the power of multiple threads. Try to load the XML into a Stream and then use Parallel.For(...).