if(this.WindowState == FormWindowState.Minimized) //判斷是否最小化
{
this.ShowInTaskbar = false; //不顯示在系統(tǒng)任務(wù)欄
notifyIcon.Visible = true; //托盤圖標(biāo)可見
}

if(this.WindowState == FormWindowState.Minimized)
{
this.ShowInTaskbar = true; //顯示在系統(tǒng)任務(wù)欄
this.WindowState = FormWindowState.Normal; //還原窗體
notifyIcon.Visible = false; //托盤圖標(biāo)隱藏
}

private ContextMenu notifyiconMnu;
#region 最小化到任務(wù)欄
/// <summary>
/// 最小化到任務(wù)欄
/// </summary>
private void Initializenotifyicon()
{
  //定義一個MenuItem數(shù)組，并把此數(shù)組同時賦值給ContextMenu對象 
  MenuItem[] mnuItms = new MenuItem[3];
  mnuItms[0] = new MenuItem();
  mnuItms[0].Text = "顯示窗口";
  mnuItms[0].Click += new System.EventHandler(this.notifyIcon1_showfrom);
  mnuItms[1] = new MenuItem("-");
  mnuItms[2] = new MenuItem();
  mnuItms[2].Text = "退出系統(tǒng)";
  mnuItms[2].Click += new System.EventHandler(this.ExitSelect);
  mnuItms[2].DefaultItem = true;
  notifyiconMnu = new ContextMenu(mnuItms);
  notifyIcon1.ContextMenu = notifyiconMnu;
  //為托盤程序加入設(shè)定好的ContextMenu對象 
}
private void notifyIcon1_DoubleClick(object sender, EventArgs e)
{
  if (this.WindowState == FormWindowState.Minimized)
  {
    this.Show();
    this.ShowInTaskbar = true; 
    this.WindowState = FormWindowState.Normal; 
    notifyIcon1.Visible = false; 
  }
}
public void notifyIcon1_showfrom(object sender, System.EventArgs e)
{
  if (this.WindowState == FormWindowState.Minimized)
  {
    this.Show();
    this.ShowInTaskbar = true;
    this.WindowState = FormWindowState.Normal;
    notifyIcon1.Visible = false;
  }
}
public void ExitSelect(object sender, System.EventArgs e)
{
  //隱藏托盤程序中的圖標(biāo) 
  notifyIcon1.Visible = false;
  //關(guān)閉系統(tǒng) 
  this.Close();
  this.Dispose(true);
}
#endregion
private void Form_main_SizeChanged(object sender, EventArgs e)
{
  if (this.WindowState == FormWindowState.Minimized)
  //判斷是否最小化
  {
    notifyIcon1.Visible = true;
    this.Hide();
    this.ShowInTaskbar = false;
    Initializenotifyicon();
  }
}