private void ChannelsHubSignalRClient_ChannelLeft(object _, ChannelLeftEventArgs e)
 {
     if (string.Equals(e.ChannelName, CurrentlySelectedChannelName, StringComparison.OrdinalIgnoreCase))
     {
         Channel.ShouldListen = false;
         NotifyStateChanged();
     }
 }
        private void ChannelsHubSignalRClient_ChannelLeft(object _, ChannelLeftEventArgs e)
        {
            UpdateConnectedStateForChannels(e.ChannelName, false);

            NotifyStateChanged();
        }