Get the currency from current culture?

You can get the symbol from CultureInfo.CurrentCulture.NumberFormat.CurrencySymbol, but I doubt this is enough; you may need to maintain a separate list per culture. Or just let the user tell you what they want to pay in (for example, they might be away from home, etc, so the culture of the PC in some hotel lounge isn't what is on their credit card)

Use the RegionInfo.ISOCurrencySymbol property. For example:

  var ri = new RegionInfo(System.Threading.Thread.CurrentThread.CurrentUICulture.LCID);
  Console.WriteLine(ri.ISOCurrencySymbol);

Output: "USD"