private void GtCompensazioni_TotalHasBeenCalculated(object sender, EventArgs e)
{
double a = 0.0;
double b = 0.0;
double c = 0.0;
double.TryParse(gtCompensazioni.GetTotalValue("2"), out a);
double.TryParse(txtCreditoEsistente.Text, out b);
c = b - a;
gtCompensazioni.SetTotalValue("2", cBusinessObjects.ConvertNumber(c.ToString()));
}