public void RemoveFriend(User user)
{
UserRelation ur = FriendsWith.FirstOrDefault(u => u.FriendWith == user);
UserRelation ur2 = FriendsOf.FirstOrDefault(u => u.FriendOf == user);
FriendsWith.Remove(ur);
FriendsWith.Remove(ur2);
FriendsOf.Remove(ur);
FriendsOf.Remove(ur2);
}
public bool AreFriends(User user)
{
return(FriendsOf.Select(f => f.FriendOf).Any(f => f.UserId == user.UserId) || FriendsOf.Select(f => f.FriendWith).Any(f => f.UserId == user.UserId));
}
public void AddFriend(User user)
{
FriendsWith.Add(new UserRelation(this, user));
FriendsOf.Add(new UserRelation(user, this));
}