How to convert XAML to PDF using C# and VB.NET

using Syncfusion.Pdf;
using System.Windows;
using System.Windows.Xps;
using System.Windows.Documents;
using System.Windows.Xps.Packaging;

Imports Syncfusion.Pdf
Imports System.Windows
Imports System.Windows.Xps
Imports System.Windows.Documents
Imports System.Windows.Xps.Packaging

private void button_Click(object sender, System.EventArgs e)
{
    //Input XAML file location
    string fileName = "input.xaml";
    //Convert XAML file to XPS file
    Stream xpsFile = GetXPSDocument(fileName);
    if (xpsFile != null)
    {
        xpsFile.Position = 0;
        //Initialize XPSToPdfConverter
        Syncfusion.XPS.XPSToPdfConverter converter = new Syncfusion.XPS.XPSToPdfConverter();
        //Convert XPS document into PDF document
        PdfDocument document = converter.Convert(xpsFile);
        //Save the Pdf document
        document.Save("XAMLToPDF.pdf");
        //Close the Pdf document
        document.Close(true);
        //This will open the PDF file so, the result will be seen in default PDF viewer 
        System.Diagnostics.Process.Start("XAMLToPDF.pdf");
    }
}
/// <summary>
/// Convert XAML flow document into XPS file
/// </summary>
private MemoryStream GetXPSDocument(string fileName)
{
    //Create visual UIElement
    UIElement visual = System.Windows.Markup.XamlReader.Load(System.Xml.XmlReader.Create(fileName)) as System.Windows.UIElement;
    FixedDocument doc = new FixedDocument();
    PageContent pageContent = new PageContent();
    FixedPage fixedPage = new FixedPage();
 
    //Create first page of document
    fixedPage.Children.Add(visual);
    ((System.Windows.Markup.IAddChild)pageContent).AddChild(fixedPage);
 
    //Adding page content to pages
    doc.Pages.Add(pageContent);
 
    //Create the stream
    MemoryStream xpsStream = new MemoryStream();
    XpsDocument xpsDocument = new XpsDocument(System.IO.Packaging.Package.Open(xpsStream, FileMode.Create));
    XpsDocumentWriter xpsDocumentWriter = XpsDocument.CreateXpsDocumentWriter(xpsDocument);
 
    //Write the XPS document
    xpsDocumentWriter.Write(doc);
 
    //Close the XPS document
    xpsDocument.Close();
    return xpsStream;
}

Private Sub button_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button.Click
    'Input XAML file location
    Dim fileName As String = "input.xaml"
    'Convert XAML file to XPS file
    Dim xpsFile As Stream = GetXPSDocument(fileName)
    If xpsFile IsNot Nothing Then
        xpsFile.Position = 0
        'Initialize XPSToPdfConverter
        Dim converter As New Syncfusion.XPS.XPSToPdfConverter()
        'Convert XPS document into PDF document
        Dim document As PdfDocument = converter.Convert(xpsFile)
        'Save the Pdf document
        document.Save("XAMLToPDF.pdf")
        'Close the Pdf document
        document.Close(True)
        'This will open the PDF file so, the result will be seen in default PDF viewer 
        System.Diagnostics.Process.Start("XAMLToPDF.pdf")
    End If
End Sub
''' <summary>
''' Convert XAML flow document into XPS file
''' </summary>
Private Function GetXPSDocument(fileName As String) As MemoryStream
    'Create visual UIElement
    Dim visual As UIElement = TryCast(System.Windows.Markup.XamlReader.Load(System.Xml.XmlReader.Create(fileName)), UIElement)
    Dim doc As New FixedDocument()
    Dim pageContent As New PageContent()
    Dim fixedPage As New FixedPage()
 
    'Create first page of document
    fixedPage.Children.Add(visual)
    DirectCast(pageContent, System.Windows.Markup.IAddChild).AddChild(fixedPage)
 
    'Adding page content to pages
    doc.Pages.Add(pageContent)
 
    'Create the stream
    Dim xpsStream As New MemoryStream()
    Dim xpsDocument As New XpsDocument(System.IO.Packaging.Package.Open(xpsStream, FileMode.Create))
    Dim xpsDocumentWriter As XpsDocumentWriter = XpsDocument.CreateXpsDocumentWriter(xpsDocument)
 
    'Write the XPS document
    xpsDocumentWriter.Write(doc)
    'Close the XPS document
    xpsDocument.Close()
    Return xpsStream
End Function