fixed the issue. Will look into that further lately i was trying to handle HttpPostedFileBase returns null issue, but i cannot really figure it out why my input file returns null although i've researched all the similiar questions to get to know about the problem in the site.My sutiation is i need to have four input file because i need four different documents other than each other. , Just Correct Your HttpPost Controller as :
public ActionResult Create(IEnumerable<HttpPostedFileBase> files)
if (files.Count() > 0) // display no of files uploaded
if (files.Any()) // display true
if (files.First() == null) // display "first null"