Controller with some synchronous and some asynchronous actions?

Is there a way to have a controller with some synchronous and some asynchro开发者_如何学JAVAnous methods on it? I have one action that would benefit from using an asynchronous model, but I don't want to drag the rest of the actions with it if I can help it.

So far the only way I've seen to do MVC async is to change the whole controller to an AsyncController.

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Stupid question I guess. Looks like you can just put synchronous actions on an AsyncController.