C#实现系统托盘

1.设置窗体属性ShowInTaskbar=false

2.加notifyicon控件notifyicon1，为控件notifyicon1的属性icon添加一个icon图标。
3.添加触发事件

 //窗体最小化
        private void FrmMain_SizeChanged(object sender, EventArgs e)
        {
              if(this.WindowState==FormWindowState.Minimized) 
              {
                  this.Visible = false;
                  this.WindowState = FormWindowState.Minimized;
                  this.notifyIcon1.Visible = true;
              }
        }
        
        private void notifyIcon1_DoubleClick(object sender, EventArgs e)
        {
            if (this.WindowState == FormWindowState.Normal)
            {
                this.notifyIcon1.Visible = true;
            }
            else
            {
                this.Visible = true;
                this.WindowState = FormWindowState.Normal;
                this.notifyIcon1.Visible = false;
            }
        }
       private void FrmMain_FormClosed(object sender, FormClosedEventArgs e)
        {
            this.notifyIcon1.Visible = false;
        }    

4.可以给notifyicon添加右键菜单：

主窗体中拖入一个contextmenu控件contextmenu1，点中控件，在上下文菜单中添加菜单，notifyicon1的contextmenu行为中选中contextmenu1作为上下文菜单。