protected void Page_Load(object sender, EventArgs e)
{
   double myNumber = 5123456.00;
   System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("pl-PL");
   Response.Write("<b><u>pl-PL</u></b><br>");
   Response.Write(myNumber.ToString("c") + "<br>");

   System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");
   Response.Write("<b><u>en-US</u></b><br>");
   Response.Write(myNumber.ToString("c") + "<br>");

   System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("vi-VN");
   Response.Write("<b><u>vi-VN</u></b><br>");
   Response.Write(myNumber.ToString("c") + "<br>");

   System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("fr-CH");
   Response.Write("<b><u>fr-CH</u></b><br>");
   Response.Write(myNumber.ToString("c"));
}
