如何在WPF中实现Silverlight相同的打印功能？

using System;
using System.Printing;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Media;

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void PrintButton_Click(object sender, RoutedEventArgs e)
    {
        PrintDialog printDialog = new PrintDialog();
        if (printDialog.ShowDialog() == true)
        {
            PrintDocument printDocument = new PrintDocument();
            printDocument.PrintPage += PrintDocument_PrintPage;

            printDialog.PrintDocument(printDocument.DocumentPaginator, "Printing from WPF");

            // Alternatively, you can use the following code to print without showing the print dialog:
            // printDocument.Print("Printing from WPF");
        }
    }

    private void PrintDocument_PrintPage(object sender, PrintPageEventArgs e)
    {
        // Create a VisualBrush with the WPF UI element to be printed
        VisualBrush visualBrush = new VisualBrush(PrintContent);

        // Calculate the printable area
        Size printableAreaSize = new Size(e.PrintableAreaWidth, e.PrintableAreaHeight);
        Rect printableAreaRect = new Rect(new Point(e.PrintableAreaOriginX, e.PrintableAreaOriginY), printableAreaSize);

        // Set the destination rectangle for the printed content
        Rect destinationRect = new Rect(new Point(0, 0), printableAreaSize);

        // Draw the visual brush onto the print page
        e.Graphics.DrawRectangle(visualBrush, null, destinationRect, printableAreaRect);
    }
}