0.新建窗体 及添加按钮

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  执行如下按钮事件ITPUB个人空间zA\I;^+M,g"pr Q0J
  private void btnFormMax_Click(object sender, EventArgs e)
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     if (this.WindowState == FormWindowState.Maximized)
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         this.WindowState = FormWindowState.Normal;
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         this.WindowState = FormWindowState.Maximized;ITPUB个人空间^0vQ9h ^
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  窗体最大化时 非全屏 不会遮盖任务栏
q@/xc^v6[Px0  此时this.FormBorderStyle. 默认为 Sizable

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  执行如下按钮事件ITPUB个人空间[#U%tsT:N%|
  private void btnFormMax_Click(object sender, EventArgs e)ITPUB个人空间:\,l!x-j(_"Qw
  {
NNYi C0^FV$Ln�_lY0      if (this.WindowState == FormWindowState.Maximized)
|GQ2p7}O!pT0      {       
%m]5|vlF0         this.WindowState = FormWindowState.Normal;
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      else
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|B}@+V}1n qAC0         this.FormBorderStyle. = FormBorderStyle.None;
\/g0o&KB t0w0         this.WindowState = FormWindowState.Maximized;
EcN%WQ�l}B0      }
\+YN0LC0   }

  窗体最大化时 会全屏 及遮盖任务栏
6F0S+N M7[0  此时this.FormBorderStyle. 为 None 不会显示窗体标题栏等相关

3.
KAK Y0HmNF0  执行如下按钮事件
~3Eo3NTp0  private void btnFormMax_Click(object sender, EventArgs e)
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      if (this.WindowState == FormWindowState.Maximized)ITPUB个人空间,B'BC;bzE*a c�xZ
      {       ITPUB个人空间iGj]g+Y%L+IE
         this.WindowState = FormWindowState.Normal;
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         this.FormBorderStyle. = FormBorderStyle.None;
;pCy*cy'p Z)g0         this.MaximumSize = new Size(Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height);ITPUB个人空间\Qh9q cn-oc
         this.WindowState = FormWindowState.Maximized;
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   }