Sharepoint 2010 Enhanced Event receivers

Following  event is called when site collection is created
public class EventReceiver1 :SPWebProvisioningProvider

{
public override void Provision(SPWebProvisioningProperties props)


{

throw new NotImplementedException();

}
 

}

Following event is called when subsite is created


public class EventReceiver2 : SPWebEventReceiver


{
public override void WebAdding(SPWebEventProperties properties)

{

base.WebAdding(properties);

}
}