使用效果：

代码：

 #region 消息框变量
 private Timer fadeTimer; // 定义计时器
 private int fadeSpeed = 2;//淡出速度
 private NotifyIcon notifyIcon;//气泡通知
 private int opacityLevel = 10;//不透明度
 public enum NotificationType
 {
     Error,//错误
     Warning,//警告
     Info//提示
 }
 #endregion
 #region 消息提醒
 public void NMessage(string message, NotificationType Type)
 {
     fadeTimer = new Timer();
     fadeTimer.Tick += FadeTimer_Tick;
     notifyIcon = new NotifyIcon();
     notifyIcon.Visible = true;
     // 根据类型选择合适的图标和错误类型
     switch (Type)
     {
         case NotificationType.Error:
             notifyIcon.Icon = SystemIcons.Error;
             notifyIcon.ShowBalloonTip(2000, "错误", message, ToolTipIcon.Error);
             break;
         case NotificationType.Warning:
             notifyIcon.Icon = SystemIcons.Warning;
             notifyIcon.ShowBalloonTip(2000, "警告", message, ToolTipIcon.Warning);
             break;
         default:
             notifyIcon.Icon = SystemIcons.Information;
             notifyIcon.ShowBalloonTip(2000, "提示", message, ToolTipIcon.Info);
             break;
     }
     // 显示气球提示框

     // 开始计时器，渐渐地隐藏消息框
     fadeTimer.Start();
 }
 private void FadeTimer_Tick(object sender, EventArgs e)
 {
     // 逐渐减小消息框的不透明度
     opacityLevel -= fadeSpeed;
     notifyIcon.Visible = opacityLevel > 0;
     if (opacityLevel <= 0)
     {
         // 当不透明度减小到0时停止计时器
         fadeTimer.Stop();
         // 关闭 NotifyIcon
         if (notifyIcon != null)
         {
             notifyIcon.Dispose();
             notifyIcon.Visible = false;
         }
     }
 }
 #endregion

使用消息框：

NMessage($"修改失败{ex.Message}", NotificationType.Error);//错误提示
NMessage($"删除{Name}成功", NotificationType.Info);//普通提示
NMessage($"删除{Name}成功", NotificationType.Warning);//警告提示