Hi

I am trying to create a friend request notification following the code snippit from the Quick Start Docs but there is something I just don't understand.

the code is 

NotificationsController.Instance.SendNotification( 
notification,
PortalSettings.PortalId,
new List<RoleInfo>(), // Pass here the list of roles or null if the notification is going to be sent to individual users only.
new List<UserInfo>(), // Pass here the list of users or null if the notification is going to be sent to roles only.
 ); // There is an overload that doesn't receive this parameter and uses Admin as sender.

I already have a list of userId defined here

private List<string> listOfFriends = new List<string>();

 so I have done this

NotificationsController.Instance.SendNotification(notification, PortalSettings.PortalId,"", listOfFriends); 

but I get invalid argument error.

How should this look?

Thanks 

Mark