private sgFrmManage getManage()
{
if (sgFrmManage == null || sgFrmManage.IsDisposed)
{
sgFrmManage = new sgFrmManage();
sgFrmManage.MdiParent = this;
}
else
{
sgFrmManage.Activate();
}
return(sgFrmManage);
}
private void bManage_Click(object sender, EventArgs e)
{
sgFrmManage sgFrmManage = getManage();
sgFrmManage.Show();
}