private void btnCheckOut_Click(object sender, EventArgs e)
{
var tmp = new StudentCheckout();
tmp.Show();
tmp.Import(txtId.Text, new AppCode.Slot()
{
RoomID = txtFromRoom.Text, Number = int.Parse(txtFromSlot.Text)
});
}
private void button3_Click(object sender, EventArgs e)
{
var tmp = new StudentCheckout();
tmp.Show();
}