Specifies that a task is attached to a parent in the task hierarchy.

Specifies that a task will be a long-running, course-grained operation. It provides a hint to the TaskSchedulerTaskScheduler that oversubscription may be warranted.

Specifies that the default behavior should be used.

A hint to a TaskSchedulerTaskScheduler to schedule a task in as fair a manner as possible, meaning that tasks scheduled sooner will be more likely to be run sooner, and tasks scheduled later will be more likely to be run later.