1.0 utf-8 yes 2.0 http://www.w3.org/2005/Atom Convert PPTX to Xlsm via C# or with free Online Converterhttps://products.aspose.com/total/net/conversion/pptx-to-Xlsm/Convert PPTX to Xlsm in C# witho......org/2005/Atom Convert PPTX to XLSM via C# or with free Online ...com/total/net/conversion/pptx-to-xlsm/Convert PPTX to XLSM in C# without using...