decimal_separator.cs

using System;
using System.Globalization;
using System.Threading;
					
public class Program
{
	public static void Main()
	{
		string s = ",3";
		
		string decSeparator = Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator;
		
		s = s.Replace(",", decSeparator).Replace(".", decSeparator);
		
		decimal d = Convert.ToDecimal(s);
		
		Console.WriteLine(d.ToString());
	}
}