public class MainWindow: Gtk.Window {
	
	protected virtual void OnBtnLoadFileClicked(object sender, System.EventArgs e)
	{
		Gtk.FileChooserDialog fc=
		new Gtk.FileChooserDialog("Choose the file to open",
		                            this,
		                            FileChooserAction.Open,
		                            Gtk.Stock.Cancel,ResponseType.Cancel,
		                            Gtk.Stock.Open,ResponseType.Accept);
		//filter begins here...
		FileFilter filter = new FileFilter();
		filter.Name = "PNG and JPEG images";
		filter.AddMimeType("image/png");
		filter.AddPattern("*.png");
		filter.AddMimeType("image/jpeg");
		filter.AddPattern("*.jpg");
		fc.AddFilter(filter);
		//second filter
		filter = new FileFilter();
		filter.Name = "PNG Images (*.png)";
		filter.AddMimeType("image/png");
		filter.AddPattern("*.png");
		fc.AddFilter(filter);
		//end filter code
		if (fc.Run() == (int)ResponseType.Accept) 
		{
			System.Console.WriteLine
		}
		//Don't forget to call Destroy() or the FileChooserDialog window won't get closed.
		fc.Destroy();
	}