Am using forms authentication to sign in users which works very well, now I want certain users to access some folders basing on their roles. But I dont know how to add roles to users after i have authenticated them. I have tried some tutorials but all in vain. This is my how I authenticate users.
FormsAuthentication.SetAuthCookie(txtusername.Text, false);
Response.Redirect("~/Admin/admin.aspx");
Please help.