Membership and Role Management

No-one is going to give you the source code for this, for one thing in basic cases there isn't very much (mostly done by configuration) and for more complex ones it will be too much. It is considered rude in sites such as this to just ask for code, as we are all volunteers and not here to do other people's work.
I suggest you google for how to do this, there are lots of examples and tutorials.
I suggest you start here, there is an excellent set of videos:
http://www.asp.net/web-forms/videos/authentication[^]

Also the related tutorials are good:
http://www.asp.net/web-forms/tutorials/security[^]

Please refer some good articles:
Understanding ASP.NET Roles and Membership - A Beginner's Tutorial[^]
Examining ASP.NET's Membership, Roles, and Profile - Part 1[^]

Some more:
How To: Use Membership in ASP.NET[^]
Membership[^]
Introduction to Membership[^]

Hi,
Refer to following links:

For creating/managing roles:
http://www.asp.net/web-forms/tutorials/security/roles/creating-and-managing-roles-cs[^]

To enable ASP.NET Membership:
http://deepak-sharma.net/2012/02/05/how-to-configure-asp-net-membership-using-sqlmembershipprovider/[^]