//关闭时清理进程
protected override void OnClosing(CancelEventArgs e)
{
YesNoForm frm = new YesNoForm("确定退出系统吗？");
if (frm.ShowDialog() == DialogResult.Yes)
{
e.Cancel = false;
Application.ExitThread();
System.Environment.Exit(0);
}
else
{
e.Cancel = true;
}
}
public static DialogResult ShowFrom(string text)
{
YesNoForm frm = new YesNoForm(text);
return(frm.ShowDialog());
}