async Task OnDocumentClosing(DocumentCloseEventArgs args)
{
try {
if (DocumentClosing != null)
{
foreach (var handler in DocumentClosing.GetInvocationList().Cast <DocumentCloseAsyncEventHandler> ())
{
await handler(this, args);
if (args.Cancel)
{
break;
}
}
}
} catch (Exception ex) {
LoggingService.LogError("Exception before closing documents", ex);
}
}
Task OnWindowClosing(object sender, DocumentCloseEventArgs args)
{
return(OnDocumentClosing(args));
}
async Task DontClose(object s, DocumentCloseEventArgs e)
{
await Task.Delay(100);
e.Cancel = true;
}