/// <summary>
/// 设置窗体最大化（不遮挡任务栏）
/// </summary>
/// <param name="frm"></param>
public virtual void SetFormMax(Form frm)
{
    frm.Top = 0;
    frm.Left = 0;
    frm.Width = Screen.PrimaryScreen.WorkingArea.Width;
    frm.Height = Screen.PrimaryScreen.WorkingArea.Height;
}