try:Form1 f = new Form1();
f.Show();
login loginfrm = new login();
if(DialogResult.OK == loginfrm .ShowDialog())
Application.Run(f);
else
Application.Exit();
f.Show();
login loginfrm = new login();
if(DialogResult.OK == loginfrm .ShowDialog())
Application.Run(f);
else
Application.Exit();
[STAThread]
static void Main()
Application.run(new login());
}
login(){
if(达到条件){
form1 ff=new form1();
this.dispose();
}else{
Application.exit();
}
}