Task.Start Method (TaskScheduler)
Assembly: mscorlib (in mscorlib.dll)
The Task instance has been disposed.
The scheduler argument is null.
The Task is not in a valid state to be started. It may have already been started, executed, or canceled, or it may have been created in a manner that doesn't support direct scheduling.
A task may only be started and run only once. Any attempts to schedule a task a second time will result in an exception.
For information on handling exceptions thrown by task operations, see Exception Handling (Task Parallel Library).
Available since 4.5
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Available since 8.1