public static jisuanqi CreateForm()
{
if (_danli == null)
{
_danli = new jisuanqi();
}
return(_danli);
}
private void toolStripButton9_Click(object sender, EventArgs e)
{
jisuanqi jisuanqi = jisuanqi.CreateForm();
//jisuanqi.MdiParent = this;
//jisuanqi.Parent = panel3;
jisuanqi.StartPosition = FormStartPosition.CenterScreen;
//jisuanqi.WindowState = FormWindowState.Maximized;
jisuanqi.Show();
}
private void jisuanqi_FormClosing(object sender, FormClosingEventArgs e)
{
_danli = null;
}