为什么不能实现在托盘显示程序图标？

C# code

using System;
using System.Resources;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace 考试系统
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnLogon_Click(object sender, EventArgs e)
        {
            if (txtUserName.Text == "admin" && txtPassword.Text == "123")
            {
                MessageBox.Show("登陆成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                Form2  fs2= new Form2();
                fs2.Show();
            }
            else
                MessageBox.Show("登录失败", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);

        }

        private void Form1_SizeChanged(object sender, EventArgs e)
        {
        }

        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (this.WindowState==FormWindowState.Minimized)
            {
                this.notifyIcon1.Visible=true;
                this.ShowInTaskbar = true;
                this.notifyIcon1.Visible = false;
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            notifyIcon1.Visible = false;
        }

        private void Form1_MinimumSizeChanged(object sender, EventArgs e)
        {
                this.Hide();
                this.ShowInTaskbar = false;
                this.notifyIcon1.Visible = true;

        }


    }
}

这个代码中 为什么不能实现程序最小化到托盘，而不在任务栏显示；当点击托盘图标，程序重新恢复任务栏显示？

if (this.WindowState==FormWindowState.Minimized)
  {
  this.notifyIcon1.Visible=true;
  this.ShowInTaskbar = true;
  this.notifyIcon1.Visible = false;
  }


  // this.notifyIcon1.Visible = false;这句去掉

Visible是false， 当然看不到。。
前面已经设置为true了，为什么又设置成false

这个也是不行的。。你帮我写个示例吧。。
就是当程序运行时，托盘处无图标，任务栏有图标；
当程序最小化时，托盘处有图标，任务栏没有图标。

我的想法是这样的：


当程序运行时，托盘处无图标，任务栏有图标；
当程序最小化时，托盘处有图标，任务栏没有图标。

C# code

 private void Form1_SizeChanged(object sender, EventArgs e)
        {
            if (this.IsDisposed || this.WindowState == FormWindowState.Minimized)
            {
                this.ShowInTaskbar = false;
                this.notifyIcon1.Visible = true;

            }
            else
            {
                this.ShowIcon = true;
                this.notifyIcon1.Visible = false;

            }
        }

C# code

 private void Form1_SizeChanged(object sender, EventArgs e)
        {
            if (this.IsDisposed || this.WindowState == FormWindowState.Minimized)
            {
                this.ShowInTaskbar = false;
                this.notifyIcon1.Visible = true;

            }
            else
            {
                this.ShowInTaskbar = true;
                this.notifyIcon1.Visible = false;

            }
        }

//我想你要的是这个效果，试一下吧。  
  private void Form1_Load(object sender, EventArgs e)
  {
  notifyIcon1.Visible = false;
  }
 
  private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
  {
  if (this.WindowState == FormWindowState.Normal)
  {
  this.notifyIcon1.Visible = true;
  this.ShowInTaskbar = false;
  this.Hide();
  this.WindowState = FormWindowState.Minimized;

  }
  }
  private void Form1_Resize(object sender, EventArgs e)
  {
  if (this.WindowState == FormWindowState.Minimized)
  {
  this.ShowInTaskbar = false ;
  this.notifyIcon1.Visible = true;
  }

  } 
}

可不可以把你的整个窗体代码贴一下呢