using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        string amountString = "$234.23";

        int currencyExponent = 2;

        string result =         String.Format("{0:000000000000.#}", Decimal.Round(

                                Decimal.Parse(amountString, NumberStyles.Currency), currencyExponent)

                                * ((int)Math.Pow(10, currencyExponent)));

        Console.WriteLine(String.Format("Result: {0}", result));

    }

}