using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        CultureInfo info = CultureInfo.CreateSpecificCulture("nb-NO");

        var numberFormat = info.NumberFormat;

        numberFormat.NumberGroupSeparator = ".";

        numberFormat.CurrencyGroupSeparator = ".";//this if you are using currency

        numberFormat.PercentGroupSeparator = ".";//this for percentages

        decimal result = 0;

        decimal.TryParse("2.320,00", NumberStyles.AllowDecimalPoint|NumberStyles.AllowThousands, info, out result);

        Console.WriteLine("Decimal value: " + result);

    }

}