private void AddFriend(Friend friend)
 {
     if (friendsList.Where(f => f.Name == friend.Name).FirstOrDefault() == null)
     {
         friendsList.Add(friend);
     }
 }
 private Friend ensure(string who, int where)
 {
     var friend = friendsList.Where(f => f.Name == who).FirstOrDefault();
     if (friend != null)
         return friend;
     var path = @"\Resources\" + who + ".png";
     friend = new Friend { Name = who, Count = 0, Location = where, ImagePath = File.Exists(path) ? path : ANONYMOUS_PIC };
     AddFriend(friend);
     return friend;
 }