user roles management using c# windows application

i wana work on a windows forms application using c# that several users can work with different roles, for example 3 roles ,that "A role" only to access some parts of the program and cannot see and access it and "B role" can acess to entire of application, but some parts are just right to access and view, "C role" full access to all parts of the Application i have these roles and users in a database (sql server).

whats a good way for make this application?

thanks in advance...