Untitled

Float value should have 2 decimals
totalAmount += float.Parse(Amount[index].ToString());

if (totalAmount.ToString().Contains("."))
        {
            string[] b = totalAmount.ToString().Split('.');
            Dollars = b[0].ToString().PadLeft(10, (char)48);
            cents = b[1].ToString().PadRight(2, (char)48).Substring(0, 2);
        }
        else
        {
            Dollars = totalAmount.ToString().PadLeft(10, (char)48);
            cents = "00";
        }

        FormattedTotalAmounts = Dollars + cents; // Here i am getting the output as i said

if (totalAmount.ToString().Contains("."))
    {
        string[] b = totalAmount.ToString().Split('.');
        Dollars = b[0].ToString().PadLeft(10, (char)48);
        cents = b[1].ToString().PadRight(2, (char)48).Substring(0, 2);
    }
    else
    {
        Dollars = totalAmount.ToString("F2").PadLeft(10, (char)48);//Necessary change
        cents = "00";
    }

    FormattedTotalAmounts = Dollars + cents;

string totalAmountFormatted = totalAmount.ToString("F2");

String.Format("{0:0.00}", 756.4);

decimal t = 756.40m;
MessageBox.Show(t.ToString("0.00"));

SomeVar.ToString("#,##0.00")

Decimal total;
foreach (object oAmount in Amount)
{
   Decimal amount = (Decimal)oAmount;
   total += amount;
}
String FormattedTotalAmounts = total.ToString("G");

String FormattedTotalAmounts = total.ToString("0000000000.00");