Convert PowerPoint Presentation to XPS Format in C#: Find more details about this code sample in the following topic: https://kb.aspose.com/slides/net/how-to-convert-pptx-to-xps-in-csharp-without-interop/

Convert PowerPoint Presentation to XPS Format in C#.cs

using System;
//Add reference to Aspose.Slides for .NET API
//Use following namespaces to convert PPTX to XPS
using Aspose.Slides;
using Aspose.Slides.Export;

namespace ConvertPPTXToXPS
{
    class Program
    {
        static void Main(string[] args)
        {
            //Set license before converting PPTX to XPS
            Aspose.Slides.License AsposeSlidesLicense = new Aspose.Slides.License();
            AsposeSlidesLicense.SetLicense(@"c:\asposelicense\license.lic");

            //load input PowerPoint presentation
            Presentation PowerPointPresentation = new Presentation("InputPowerPointPresentation.pptx");
            //save output XPS file
            PowerPointPresentation.Save("PresentationConvertedToXPS.xps", SaveFormat.Xps);
        }
    }
}