using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        decimal val = 0;

        decimal val2 = 0;

        decimal.TryParse("123.123", out val);

        decimal.TryParse("123.123".Replace('.', ','), NumberStyles.Number, CultureInfo.GetCultureInfo("ru-RU"), out val2);

        Console.WriteLine(val);

        Console.WriteLine(val2);

    }

}