Saving XpsDocument to Harddisk C#

private static void SaveXpsDocument(XpsDocument xpsDocument, string filePath)
{
    XpsDocument xpsd = new XpsDocument(filePath, FileAccess.ReadWrite);
    System.Windows.Xps.XpsDocumentWriter xw = XpsDocument.CreateXpsDocumentWriter(xpsd);
    xw.Write(xpsDocument.GetFixedDocumentSequence());
    xpsd.Close();
}