How to run a Task on a custom TaskScheduler using await?

Question

I have some methods returning Task on which I can await at will. I\'d like to have those Tasks executed on a custom TaskScheduler

Answer 1

I think what you really want is to do a Task.Run, but with a custom scheduler. StartNew doesn't work intuitively with asynchronous methods; Stephen Toub has a great blog post about the differences between Task.Run and TaskFactory.StartNew.

So, to create your own custom Run, you can do something like this:

private static readonly TaskFactory myTaskFactory = new TaskFactory(
    CancellationToken.None, TaskCreationOptions.DenyChildAttach,
    TaskContinuationOptions.None, new MyTaskScheduler());
private static Task RunOnMyScheduler(Func func)
{
  return myTaskFactory.StartNew(func).Unwrap();
}
private static Task RunOnMyScheduler(Func> func)
{
  return myTaskFactory.StartNew(func).Unwrap();
}
private static Task RunOnMyScheduler(Action func)
{
  return myTaskFactory.StartNew(func);
}
private static Task RunOnMyScheduler(Func func)
{
  return myTaskFactory.StartNew(func);
}

Then you can execute synchronous or asynchronous methods on your custom scheduler.