public override Task OnDisconnectedAsync(Exception exception)
{
lock (ParticipantsConnectionLock)
{
var connectionIndex = AllConnectedParticipants.FindIndex(x => x.Participant.Id == Context.ConnectionId);
if (connectionIndex >= 0)
{
var participant = AllConnectedParticipants.ElementAt(connectionIndex);
var groupsParticipantIsIn = AllGroupParticipants.Where(x => x.ChattingTo.Any(u => u.Id == participant.Participant.Id));
AllConnectedParticipants.RemoveAll(x => groupsParticipantIsIn.Any(g => g.Id == x.Participant.Id));
AllGroupParticipants.RemoveAll(x => groupsParticipantIsIn.Any(g => g.Id == x.Id));
AllConnectedParticipants.Remove(participant);
DisconnectedParticipants.Add(participant);
Clients.All.SendAsync("friendsListChanged", AllConnectedParticipants);
}
return(base.OnDisconnectedAsync(exception));
}
}