c# string character replace

Question

I have a string where the third last character is sometimes a , If this is the case I want to replace it with a . The string could also have other

Answer 1

A more proper method would probably be to use the cultures

string input = "12345,67";
System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("nl-NL");
decimal value = System.Convert.ToDecimal(input);
System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");
string converted = string.Format("{0:C}", value);