Avatars for users

I've had a look around here and so far I found many answers, but due to the fact that I'm new to MVC world I can't accomplish my task. After create a new MVC 5 application I'm simply trying to add an Avatar Image for my users, stored in the DATABASE.

So far can anyone please provide me which change I have to made to the default MODELS, CONTROL and VIEW to accomplish that? Thanks very much, it would be very appreciated. Thanks in Advance.