Merge XPS Files in C#. For more details: https://kb.aspose.com/page/net/merge-xps-files-in-csharp/

Merge XPS Files in C#.cs

using System.IO;
using Aspose.Page;
class Program
{
    static void Main(string[] args)
    {
        new License().SetLicense("License.lic");

        // Load XPS document
        Aspose.Page.XPS.XpsDocument document = new Aspose.Page.XPS.XpsDocument("input.xps", new Aspose.Page.XPS.XpsLoadOptions());

        // Initialize PdfSaveOptions object
        Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions options = new Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions()
        {
            JpegQualityLevel = 100,
            ImageCompression = Aspose.Page.XPS.Presentation.Pdf.PdfImageCompression.Jpeg,
            TextCompression = Aspose.Page.XPS.Presentation.Pdf.PdfTextCompression.Flate
        };

        // Create Stream object
        var fileStream = new FileStream("mergedXPS.pdf", FileMode.Create, FileAccess.Write);

        // Create a Device for PDF
        Aspose.Page.Device device = new Aspose.Page.XPS.Presentation.Pdf.PdfDevice(fileStream);

        // Create an XPS files
        string[] filesToMerge = new string[] { "input.xps", "input.xps" };

        // Merge XPS files
        document.Merge(filesToMerge, device, options); fileStream.Dispose();
    }
}