using System;

using System.Collections.Generic;

using System.IO;

using System.Xml;

using System.Xml.Serialization;

using System.Globalization;

​

public class Program

{

    public static void Main()

    {

        var stripped = "123,456,.12";

​

         var periodIndex = stripped.LastIndexOf('.');

            var periodIndexFromEnd = periodIndex < 0 ? periodIndex : (periodIndex - stripped.Length) * -1;

            var commaIndex = stripped.LastIndexOf(',');

            var commaIndexFromEnd = commaIndex < 0 ? commaIndex : (commaIndex - stripped.Length) * -1;

            CultureInfo cultureInfo = new CultureInfo("en-US");

​

            if (commaIndexFromEnd == 3 || periodIndexFromEnd == 4)

            {

                cultureInfo = new CultureInfo("da-DK");

            }

        Console.WriteLine(",: " + commaIndexFromEnd);    

        Console.WriteLine(".: " + periodIndexFromEnd);    

        Console.WriteLine("stripped: " + stripped);    

        Console.WriteLine("cultureInfo: " + cultureInfo.DisplayName);    

        Console.WriteLine(decimal.TryParse(stripped, NumberStyles.Any, cultureInfo, out var price));

        Console.WriteLine(price.ToString());

    }

}