Cannot implicitly convert type 'System.Threading.Tasks.Task<System.Web.Mvc.ActionResult>' to 'System.Web.Mvc.ActionResult'

Question

Error is on line #5 of the code below:

public class FirstController : Controller{
    public async Task<ActionResult> Index()
    {
        OtherController OtherController = new OtherController();
        return OtherController.Index();
    }
}

Then the OtherController:

public class OtherController : Controller{
    public async Task<ActionResult> Index()
    {            
        //Tasks...
        //await...
        return View();
    }   
}

I tried this and get the same error on line #5:

public class FirstController : Controller{
    public ActionResult Index()
    {
        OtherController OtherController = new OtherController();
        return OtherController.Index();
    }
}

How do I get this to work?

Solution

You need to await the result of calling OtherController.Index(); as this method is marked as async. Because you are awaiting that call, your FirstController.Index method also needs to be marked as async.

In your FirstController.Index method you would therefore have:

return await OtherController.Index();

Comments

[nick_w]

What if you went return await OtherController.Index(); instead?