1.0 utf-8 yes 2.0 http://www.w3.org/2005/Atom Convert PPT to Xlsb via C# or with free Online Converterhttps://products.aspose.com/total/net/conversion/ppt-to-Xlsb/Convert PPT to Xlsb in C# without ......org/2005/Atom Convert PPT to XLSB via C# or with free Online ...com/total/net/conversion/ppt-to-xlsb/Convert PPT to XLSB in C# without using...