private void Tb_TextChanged(object sender, EventArgs e)
{
var tb = sender as Control;
StringRule rule = ruleMap[tb];
if (rule.Pass(tb.Text))
{
errorProvider.SetError(tb, "");
return;
}
else
{
errorProvider.SetError(tb, rule.Hint);
UnvalidatedInput?.Invoke(tb, rule);
}
}