using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;

namespace PdfViewerInWpf
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
    }
}

using System;
using System.Drawing;
using System.Windows;

namespace PdfViewerInWpf
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            // Load a sample document on startup
            pdfViewerControl1.InputFile = "sample.pdf";
        }

        private void menuItemOpen_Click(object sender, RoutedEventArgs e)
        {
            Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog
            {
                Filter = "PDF Files (*.pdf)|*.pdf|All Files (*.*)|*.*"
            };

            bool? result = dlg.ShowDialog();

            if (result == true)
                pdfViewerControl1.InputFile = dlg.FileName;
        }
    }
}