using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(CultureInfo.CurrentCulture);

        Console.WriteLine("Separador miles: " + CultureInfo.CurrentCulture.NumberFormat.CurrencyGroupSeparator); // Separador miles: ,

        Console.WriteLine("Separador decimal: " + CultureInfo.CurrentCulture.NumberFormat.CurrencyDecimalSeparator); // Separador decimal: .

        Console.WriteLine(double.Parse("11.40")); // 11.4

        Console.WriteLine(double.Parse("114,0")); // 1140

        Console.WriteLine(double.Parse("11,40")); // 1140

        Console.WriteLine(double.Parse("1,140")); // 1140       

        Console.WriteLine(double.Parse("114,0.40")); // 1140.4      

        Console.WriteLine(double.Parse("11,40.40")); // 1140.4      

        Console.WriteLine(double.Parse("1,140.40")); // 1140.4

        Console.WriteLine(1140.ToString("C")); // $1,140.00

        Console.WriteLine(11.40.ToString("C")); // $11.40

        Console.WriteLine();

        NumberFormatInfo nfi = new CultureInfo("en-US", false ).NumberFormat;

        //      

        Console.WriteLine(123456789.ToString( "C", nfi )); // $123,456,789.00       

        //      

        nfi.CurrencyDecimalSeparator = ",";

        nfi.CurrencyGroupSeparator = ".";

        Console.WriteLine(123456789.ToString( "C", nfi )); // $123.456.789,00

        CultureInfo elGR = CultureInfo.CreateSpecificCulture("el-GR");

        Console.WriteLine(double.Parse("11,40", elGR)); // 11.40

        Console.WriteLine(double.Parse("11.40", elGR)); // 1140

    }   

}