I should have been more clear.  The filevalidating gets fired DIRECTLY after the file has been uploaded and there are still items left in queue.  This gives you a sort-of parallel processing for the uploads.  The control continues to upload while your method is manipulating the last uploaded file. 

 

The fileuploaded event(s) get fired after all files have been uploaded, once for each file.  I.E. When upload is complete.  So yes, it does get fired for each file, but not until all files have been uploaded.