Overload 0: returns _InternalReturnType This is the most basic task with no unwrapping

Returns the origin information for the caller (runtime / Windows Runtime apartment as far as task continuations need know)

<summary> Test whether current event has been either Set, or Canceled. </summary>

Only allow instantiation through derived class

<summary> Register a task with this event. This function is called when a task is constructed using a task_completion_event. </summary>

see: http://gcc.gnu.org/onlinedocs/gcc/Return-Address.html this is critical to inline

<summary> Function executes a continuation. This function is recorded by a parent task implementation when a continuation is created in order to execu

Fire and forget

<summary> Sets a property determining whether the task is apartment aware. </summary>

<summary> Set the implementation of the task to be the supplied implementation. </summary>