public static Task <TResult> Success <T, TResult>(this Task <T> task, Func <Task <T>, TResult> successor)
{
return(task.ContinueWith <Task <TResult> >(delegate(Task <T> _)
{
if (task.IsFaulted)
{
return TaskAsyncHelper.FromError <TResult>(task.Exception);
}
if (task.IsCanceled)
{
return TaskAsyncHelper.Cancelled <TResult>();
}
return Task.Factory.StartNew <TResult>(() => successor(task));
}).Unwrap <TResult>());
}
private static Task MakeEmpty()
{
return(TaskAsyncHelper.FromResult <object>(null));
}