Is there an alternative to Task.Delay(0) and Task.FromResult(0)?

I am attempting to create a Portable Class Library (.NET 4.5/Silverlight 5/Win Phone 8/WinRT) that takes advantage of the async/await feature set. I found that I need to include the `Microsoft.Bcl.Async` NuGet package in order to get this feature to work, so I did just that. Apparently due to my targets I do not have access to `Task.Delay(0)` or `Task.FromResult(0)`. I was wondering what the next best alternative is? Currently, I am using: `new Task(() => { })` (basically, a Task that does not perform any action.) I'm not sure if that is the best equivalent to either of the previously mentioned patterns. Update: Apparently I'm blind and did not see `TaskEx` in my intellisense menu. I'm leaving the question open so people know that it is there, just easily missable because my intellisense kept autocompleting to `TaskExtensions`.