~/Views/Test/Index.aspx
~/Views/Test/Index.ascx
~/Views/Shared/Index.aspx
~/Views/Shared/Index.ascx
~/Views/Test/Index.cshtml
~/Views/Test/Index.vbhtml
~/Views/Shared/Index.cshtml
~/Views/Shared/Index.vbhtml

return View("NameOfView", Model);

return PartialView("PartialViewName", Model);

return View("ViewName", yourModel);

return View("~/Views/FolderName/ViewName.aspx");