Format 0 specially for double value format in CSharp

using System;//from  w  w w  .  j  a va 2s.  c o  m

public class MainClass
{
    public static void Main()
    {


        double posValue = 1234;
        double negValue = -1234;
        double zeroValue = 0;

        string fmt2 = "##;(##)";
        string fmt3 = "##;(##);**AAA**";

        Console.WriteLine(posValue.ToString(fmt2));
        Console.WriteLine(negValue.ToString(fmt2));

        Console.WriteLine(zeroValue.ToString(fmt3));
    }
}