using System;

using System.Globalization;                 

public class Program

{

    public static void Main()

    {

        double altura = 1.59;

        Console.WriteLine(altura.ToString("N2"));

        Console.WriteLine(altura.ToString("N2", CultureInfo.InvariantCulture ));

        Console.WriteLine(altura.ToString("N2", CultureInfo.CreateSpecificCulture("pt-BR")));

        Console.WriteLine(altura.ToString("N2", CultureInfo.CreateSpecificCulture("en-US")));

        string s = "1,59";

        double d;

        if (double.TryParse(s,NumberStyles.Float,CultureInfo.CreateSpecificCulture("pt-BR"), out d))

        {

            Console.WriteLine("valor: "+d); 

        }

        if (double.TryParse(s, out d))

        {

            Console.WriteLine("valor: "+d); 

        }

    }

}

​