RedirectToAction method has different types of forms it takes 1 to 6 types of arguments depending upon our requirement we need to use suitable form.
Here you can use RedirectToAction with two parameters method, both are string type parameters.First parameter is Action name and second is Controller name as below
return RedirectToAction("ActionName", "ControllerName");
More information please go through the below link
http://msdn.microsoft.com/en-us/library/system.web.mvc.controller.redirecttoaction(v=vs.118).aspx[
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Thanks,
--RG