c# - I can't figure out how to navigate to a previous page

Question

I have two ways of navigating to a form that I'm using. However, once this form has been submitted, I would like to return to the previous page that I was on. Is there a certain url path that I can navigate to based on which page I was on previously?

I'm using just a standard form and a mvc architecture.

Here's my controller for this form:

    [HttpPost]
    public ActionResult Create(CreateConversationViewModel model)
    {
        try
        {
            _ConversationManager.Create(model.Message, model.GetReceivers(), model.SenderId);
            return RedirectToAction("Me", "People");
        }
        catch (ValidationException ex)
        {
            ex.AddToModelState(ViewData.ModelState);
        }

        return View(model);
    } 

when I return to the People/Me page, that would only redirect to one of the pages.