NullReferenceException in MVC

kindly provide some code...and the error says all...generally u r code expects some values from previous page ...but you are trying to execute curent pages ...like first u need to register after u must login ...but if u open login as a starting page some values other than login credentials are coming from register page may miss ....like wise....try to understand the scenario ...most of the null reference exception cases are like this

Theproblem may be due to the value comes asnull. You should checkfor null first then youproceed. Try to debug and find out which value comes null andtry to fix it.