private void Hole_Leave(object sender, EventArgs e)
{
DialogResult re;
if (long.TryParse(Hole.Text, out long mynum))
{
if (mynum < 0)
{
re = MessageBox.Show("Error");
if (re == DialogResult.OK)
{
Hole.Clear();
}
return;
}
number = mynum;
}
else
{
re = MessageBox.Show("Error");
if (re == DialogResult.OK)
{
Hole.Clear();
}
}
}