//创建窗体对象的静态方法
public static DingBanLiCengQvxian InstanceObject()
{
if (_instance == null)
_instance = new DingBanLiCengQvxian();
return _instance;
}
private void DingBanLiCengQvxian_FormClosing(object sender, FormClosingEventArgs e)
{
_instance = null;
}
