use following code

[Kazi]

if (Request["id"] != null)
{
string d = Request["id"];
System.Guid UserGUID = new Guid(d);
MembershipUser user = Membership.GetU ser(UserGUID);
if (user != null && user.IsApproved == false)
{
user.IsApproved = true;
Membership.Upda teUser(user);
}
}

regards,

https://www.uptothesky.com