Tasks - Cancellation - Some Problem with Debugger Stopped on OperationCanceledException

http://habrahabr.ru/post/168669/

Debug Stopped Problem:

The main point: do not handle exceptions within task body without re-throwing them.

http://stackoverflow.com/questions/21874665/operationcanceledexception-was-unhandled-by-user-code-when-i-call-throwifcancell

https://social.msdn.microsoft.com/Forums/vstudio/en-US/9a76bed7-6842-4b43-8b8f-07dc8b3abe93/why-operationcanceledexception-was-not-handled-in-user-code?forum=parallelextensions

http://stackoverflow.com/questions/16222132/regarding-asynchronous-task-why-is-a-wait-required-to-catch-operationcanceled

http://stackoverflow.com/questions/12557371/unhandled-operationcanceledexception-when-thrown-from-parallel-foreach

http://stackoverflow.com/questions/12633903/elegantly-handle-task-cancellation

http://www.acnenomor.com/336813p1/operationcanceledexception-was-unhandled-by-user-code-when-i-call-throwifcancellationrequested

http://www.4byte.cn/question/181056/operationcanceledexception-was-unhandled-by-user-code-when-i-call-throwifcancellationrequested.html

MSDN:

http://msdn.microsoft.com/en-us/library/system.operationcanceledexception(v=vs.110).aspx

http://blogs.msdn.com/b/csharpfaq/archive/2010/07/19/parallel-programming-task-cancellation.aspx?PageIndex=2

http://msdn.microsoft.com/ru-ru/library/dd537607(v=vs.110).aspx