While trying out the tutorial from
http://mvcrocksonasp.net/OAuthWithMVC4
Followed the instructions to add the facebook.png like so
Dictionary<string, object> facebookExtraData = new Dictionary<string, object>();
facebookExtraData.Add("Icon", "../Images/facebook.png");
But it didn't work so anyone able to get the images on the browser ?
came across zocial and this blog post which addresses this specific question
http://www.beabigrockstar.com/customizing-external-login-buttons-in-asp-net-mvc-4/
the sample project is here
https://github.com/jerriep/CustomizeOAuthLoginBranding
the final result looks like so