how to insert data in aspnet_profile table ?

Hi,
I am using asp.net membership , roles and profile in my project . I am able to create users through Membership.CreateUser() function that uses aspnet_Users table. But i could'nt find out any method to add a new row in aspnet_profile table .Because while creating a new user , user also fills some additional details , that should go to aspnet_profile table . Can anyone please tell how to do that ?
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