Open
Description
Summary
Right now, public async methods must return IAsnycAction, IAsnycActionWithProgress<TProgress>, IAsnycOperation<TResult>, or IAsnycOperationWithProgress<TResult, TProgress>. Instead, developers should be allowed to return Task and Task<T> and have a source generator create the "wrapping" version that returns the WinRT type.
Rationale
Usage of TPL things is much easier for developers, and allows for easier usage of async/await.
Important Notes
Should also support methods that have progress and cancelation.
Given RemoteThing.cs, the methods marked as [DebuggerNonUserCode] should be generated for the user
Open Questions
Should this be the default or should it be opt-in?