Parse a string to decimal with NumberStyles.AllowDecimalPoint
using System; using System.Globalization; class MainClass { public static void Main( ) { decimal number; string value = "1345,978"; NumberStyles style = NumberStyles.AllowDecimalPoint; CultureInfo culture = CultureInfo.CreateSpecificCulture("fr-FR"); if (Decimal.TryParse(value, style, culture, out number)) Console.WriteLine("Converted '{0}' to {1}.", value, number); else Console.WriteLine("Unable to convert '{0}'.", value); } }