App.xaml.cs

using DcimIngester.Windows;
using Hardcodet.Wpf.TaskbarNotification;
using System;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Reflection;
using System.Windows;
using System.Windows.Controls;

namespace DcimIngester
{
    public partial class App : Application
    {
        private MainWindow? mainWindow = null;

        /// <summary>
        /// Indicates whether the settings window is currently open.
        /// </summary>
        public bool IsSettingsOpen { get; private set; } = false;

        private void Application_Startup(object sender, StartupEventArgs e)
        {
            if (DcimIngester.Properties.Settings.Default.Destination.Length == 0)
            {
                if (new Settings().ShowDialog() == false)
                    Shutdown();
            }

            TaskbarIcon taskbarIcon = new TaskbarIcon
            {
                ToolTip = "DCIM Ingester",
                ContextMenu = (ContextMenu)FindResource("TaskbarIconContextMenu")
            };

            using (Stream stream = GetResourceStream(new Uri(
                "pack://application:,,,/DcimIngester;component/Icon.ico")).Stream)
            {
                taskbarIcon.Icon = new Icon(stream);
            }

            taskbarIcon.Visibility = Visibility.Visible;
            mainWindow = new MainWindow();

            // Need to show the window to get the Loaded event to trigger
            mainWindow.Show();
            mainWindow.Hide();
        }

        private void MenuItemSettings_Click(object sender, RoutedEventArgs e)
        {
            if (mainWindow!.IngestsInWork > 0)
            {
                MessageBox.Show("Dismiss all ingests before opening Settings.", "DCIM Ingester",
                    MessageBoxButton.OK, MessageBoxImage.Exclamation, MessageBoxResult.OK,
                    MessageBoxOptions.DefaultDesktopOnly);
            }
            else
            {
                IsSettingsOpen = true;
                Settings settings = new Settings();
                settings.Closed += delegate { IsSettingsOpen = false; };
                settings.ShowDialog();
            }
        }

        private void MenuItemAbout_Click(object sender, RoutedEventArgs e)
        {
            FileVersionInfo versionInfo =
                FileVersionInfo.GetVersionInfo(Assembly.GetEntryAssembly()!.Location);

            string versionString = string.Format("{0} V{1}. Created by {2}.",
                versionInfo.ProductName, versionInfo.FileVersion, versionInfo.CompanyName);

            MessageBox.Show(versionString, "DCIM Ingester", MessageBoxButton.OK,
                MessageBoxImage.Information, MessageBoxResult.OK,
                MessageBoxOptions.DefaultDesktopOnly);
        }

        private void MenuItemExit_Click(object sender, RoutedEventArgs e)
        {
            if (mainWindow!.IngestsInWork > 0)
            {
                MessageBox.Show("Dismiss all ingests before exiting.", "DCIM Ingester",
                    MessageBoxButton.OK, MessageBoxImage.Exclamation, MessageBoxResult.OK,
                    MessageBoxOptions.DefaultDesktopOnly);
            }
            else Shutdown();
        }
    }
}