String format in C# to currency

using System;
using System.Globalization;
 
public class Test
{
	public static void Main()
	{
	    Decimal dec = new Decimal(-1234.4321);
	    CultureInfo culture = CultureInfo.CreateSpecificCulture("en-US");
	    culture.NumberFormat.CurrencyNegativePattern = 1; 
	    String str = String.Format(culture, "{0:C}", dec);
	    Console.Write(str);
	}
}