Question

Is it ok to have action which returns object type? What implications may it couse?

Thank you

Answer 1

In ASP.NET MVC all your controller actions should return types that derive from ActionResult which is the base class for all results such as ViewResult, RedirectToRouteResult, FileResult, JsonResult, …. So you could perfectly fine have:

public ActionResult FooBarBaz()
{
    if (foo)
    {
        return File("foo.txt", "text/plain");
    }
    else if (bar)
    {
        return View();
    }
    else
    {
        return RedirectToAction("baz");
    }
}