Store UserId in Profile Data

    protected void SiteCreateUserWizard_CreatedUser(object sender, EventArgs e)
    {
        // get the newly create user and add custom defaults to the profile data
        ProfileCommon userProfile = (ProfileCommon)ProfileCommon.Create(this.SiteCreateUserWizard.UserName, true);

        // we need to add'l store the UserId of the user in its profile data so that we can obtain
        // it later when using object binding
        MembershipUser createdUser = Membership.GetUser(this.SiteCreateUserWizard.UserName);
        userProfile.UserId = (Guid)createdUser.ProviderUserKey;
        
        // save the changes
        userProfile.Save();
    }