托盘点击4下才显示？解决方案

托盘点击4下才显示？？？
winform的超级菜鸟，请教一下，
从网上抄的代码，托盘后，2下2下点击，总点击4次后托盘才显示窗口，是不是代码问题，谢谢

C# code

        private void Form1_Load(object sender, EventArgs e)        {            // 任务栏显示小图标            this.notifyIcon1.ShowBalloonTip(1, "系统提示", "程序正在运行~~~", ToolTipIcon.Info);        }        private void HideMainForm()        {            this.Hide();        }        private void ShowMainForm()        {            this.Show();            this.WindowState = FormWindowState.Normal;            this.Activate();        }        private void ExitMainForm()        {            if (MessageBox.Show("您确定要退出化验数据接收程序吗？", "确认退出", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.OK)            {                this.notifyIcon1.Visible = false;                this.Close();                this.Dispose();                Application.Exit();            }        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)        {            e.Cancel = true;            HideMainForm();        }        private void notifyIcon1_DoubleClick(object sender, EventArgs e)        {            if (this.WindowState == FormWindowState.Normal)            {                this.WindowState = FormWindowState.Minimized;                HideMainForm();            }            else if (this.WindowState == FormWindowState.Minimized)            {                //this.WindowState = FormWindowState.Normal;                ShowMainForm();            }        }        private void Form1_SizeChanged(object sender, EventArgs e)        {            if (this.WindowState == FormWindowState.Minimized)            {                HideMainForm();            }        }        private void 显示ToolStripMenuItem_Click(object sender, EventArgs e)        {            ShowMainForm();        }        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)        {            ExitMainForm();        }

C# code

        private void Form1_SizeChanged(object sender, EventArgs e)        {            if (this.WindowState == FormWindowState.Minimized)            {                HideMainForm();            }        }
[解决办法]
把notifyIcon1_DoubleClick这里的HideMainForm()去掉,
因为你double之后会触发sizechanged事件。change事件又调用了一次hide
[解决办法]
加这句话 this.WindowState = FormWindowState.Minimized;
[code = c#]private void Form1_FormClosing(object sender, FormClosingEventArgs e)
       {
           e.Cancel = true;
           this.WindowState = FormWindowState.Minimized;
           HideMainForm();
          
       }[/code]