Templates working

WGneu/App.xaml.cs

@@ -11,9 +11,11 @@ namespace WGneu {
     public partial class App : Application {
 
         public static bool IsPrintingReady => Documents.Html.IsReady && Documents.Pdf.IsReady;
+        public static System.Windows.Threading.Dispatcher MainDispatcher { get; private set; }
 
         public App() : base() {
             System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
+            MainDispatcher = Dispatcher;
         }
 
         public void App_Startup(object sender, EventArgs e) {
@@ -21,6 +23,10 @@ namespace WGneu {
             Task.Run(() => Documents.Pdf.Init(PrintingReadyChanged));
         }
 
+        public void App_Exit(object sender, EventArgs e) {
+            Task.Run(() => Documents.Pdf.Close());
+        }
+
         private void PrintingReadyChanged() {
             Dispatcher.BeginInvoke(App_PrintingReadyChanged, this, new EventArgs());
         }