private void timer_Tick(object sender, EventArgs e)
 {
     try
     {
         using (var conversionServiceClient = new ConversionServiceReference.ConversionServiceClient())
         {
             var serverStatus = conversionServiceClient.GetServerStatus();
             this.updateLabel(serverStatus);
         }
     }
     catch
     {
         this.updateLabel(ServerState.Offline);
     }
 }
        private void RefreshButtonClick(object sender, RoutedEventArgs e)
        {
            try
            {
                using (var conversionServiceClient = new ConversionServiceReference.ConversionServiceClient())
                {

                    var res = conversionServiceClient.GetAvailableFiles();
                    this.files = res.ToList();
                    this.listBoxFiles.ItemsSource = files;
                }
            }
            catch(Exception ex)
            {
                Console.WriteLine(ex);
            }
        }