public static void ShowSingleWindow()
{
if (Window == null)
{
Window = new ChooseReportWindow {
Owner = Application.Current.MainWindow
};
Window.ShowDialog();
}
else
{
Window.Activate();
}
}
private static void ChooseReportWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
Window = null;
}