DocumentClose Method
            Releases all the resources allocated by this PDF document. Always call this method after the document was saved.
            If the document was created from a stream or file, the stream will be closed if it was not explicitly detached 
            by calling the DetachStream() before the document is closed.
            
Namespace: WinnovativeAssembly: WnvHtmlToPdf_NetCore (in WnvHtmlToPdf_NetCore.dll) Version: 19.0.0