c# - Visual Studio becomes laggy and freezes with too much parallel loops -

we found strange issue in visual studio.

if put more 6 or maybe more parallel loops each other, visual studio becomes laggy.

if click loop, , try scroll, or try click outside of loops, click loop again, vs freezes 5-10 secs. simple loops problem never occurs, think problem that, in case of parallel loops have actions, , maybe kills ide.

we have tested both vs2012 , vs2013 , it's same.

here example:

using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks;  namespace consoleapplication1 {     class program     {         static list<string> _list = new list<string>();          static void main(string[] args)         {             parallel.foreach(_list, element1 =>                 {                     parallel.foreach(_list, element2 =>                         {                             parallel.foreach(_list, element3 =>                                 {                                     parallel.foreach(_list, element4 =>                                         {                                             parallel.foreach(_list, element5 =>                                                 {                                                     parallel.foreach(_list, element6 =>                                                     {                                                         parallel.foreach(_list, element7 =>                                                         {                                                          });                                                     });                                                 });                                         });                                 });                         });                 });         }     } } 

if had similar problems, , know solution, please answer!