private void tsmiBase_Click(object sender, EventArgs e)
{
BoxSizeInfo bsinfo = BoxSizeInfo.CreateForm();
bsinfo.MdiParent = this;
bsinfo.Show();
}
public static BoxSizeInfo CreateForm()
{
if (_single == null)
{
_single = new BoxSizeInfo();
}
else
{
_single.Activate();
}
return(_single);
}
private void this_FormClosed(object sender, FormClosedEventArgs e)
{
_single = null;
}