private void button4_Click(object sender, EventArgs e)
{
AddPhonNumber addinfo = AddPhonNumber.CreateForm(NumberAdd);
addinfo.Show();
addinfo.Focus();
}
public static AddPhonNumber CreateForm(AddNumber bind)
{
databind = bind;
if (_danli == null)
{
_danli = new AddPhonNumber();
}
return(_danli);
}
private void AddPhonNumber_FormClosing(object sender, FormClosingEventArgs e)
{
_danli = null;
}
