正文

添加工具类

using System;
using System.Drawing;
using System.Windows.Forms;
namespace ColorPicker.Utils
    public class SystemTray
        public static SystemTray Instance;
        /// <summary>
        /// 静态构造函数,在类第一次被创建或者静态成员被调用的时候调用
        /// </summary>
        static SystemTray()
            Instance = new SystemTray();
        public NotifyIcon Ni { get; set; }
        private SystemTray()
            Ni = new System.Windows.Forms.NotifyIcon();
            Ni.Icon = new Icon(
               System.Windows.Application.GetResourceStream(
                 new Uri(
                 "app.ico", UriKind.Relative)
               ).Stream
            //Ni.Icon = SystemIcons.Question;
            Ni.Visible = true;
            Ni.MouseClick += Ni_MouseClick;
        private void Ni_MouseClick(object sender, MouseEventArgs e)
            System.Windows.Controls.ContextMenu NotifyIconMenu = (System.Windows.Controls.ContextMenu)App.Current.FindResource("NotifyIconMenu");
            if (e.Button == MouseButtons.Right)
                NotifyIconMenu.IsOpen = true;
                NotifyIconMenu.IsOpen = false;
        /// <summary>
        /// 销毁系统托盘图标的资源
        /// </summary>
        public void DisposeNotifyIcon()
            Ni?.Dispose();
}

App.xaml

<Application.Resources>
  <ContextMenu x:Key="NotifyIconMenu" StaysOpen="False">
    <MenuItem
              Name="MenuExit"
              Click="MenuExit_Click"
              Header="退出" />
  </ContextMenu>
</Application.Resources>

App.xaml.cs

public partial class App : Application
  private void MenuExit_Click(object sender, RoutedEventArgs e)
    SystemTray.Instance.DisposeNotifyIcon();
    App.Current.Shutdown();
  private void Application_Startup(object sender, StartupEventArgs e)
    _ = SystemTray.Instance;