Asp.net Membership roles and menus

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ASP.NET

Hi
I am using Asp.net Membership in my project .I have created a page for adding and assigning multiple roles to users .On the basis of roles i want to bind menus.My Problem is that when i assign one role to user it works fine but if i assign multiple roles tan how to write code for it
My dbase has two tables one for Menus and other for role in menu that has two columns role and menu.Entries are like
Role Menu
A 1
A 2
B 1

I want complete code that has pages to add menus and show accordingly..