protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
WindowPlacement.SetPlacement(new WindowInteropHelper(this).Handle, Settings.Default.MainWindowPlacement);
}
protected override void OnClosing(CancelEventArgs e)
{
Settings.Default.MainWindowPlacement = WindowPlacement.GetPlacement(new WindowInteropHelper(this).Handle);
Settings.Default.Save();
}
