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Editorial Team
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Asked: 2026-05-22T16:03:14+00:00

Assuming an invariant culture , is it possible to define a different group separator

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Assuming an invariant culture, is it possible to define a different group separator in the format – than the comma?

Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
Console.WriteLine(String.Format("{0:#,##0}", 2295));

Output: 

2,295

Desired output: 

2.295

The invariant culture is a requirement because currencies from many different locales are being formatted with format strings, that have been user defined. Ie for Denmark they have defined the price format to be “{0:0},-“, while for Ireland it might be “€{0:#,##0}”.

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1 Answer

  1. Editorial Team

    When you have different format strings, this does not mean that you have to use InvariantCulture. If you have a format string for germany e.g. you format this string using the Culture(“de-de”):

    String.Format(CultureInfo.GetCultureInfo( "de-de" ), "{0:0},-", 2295) //will result in 2.295,-
String.Format(CultureInfo.GetCultureInfo( "en-us" ), "{0:0},-", 2295) //will result in 2,295,-

    Alternatively you can specify your custom number format info:

    NumberFormatInfo nfi = new NumberFormatInfo( )
{
    CurrencyGroupSeparator = ":"
};
String.Format(nfi, "{0:0},-", 2295) //will result in 2:295,-
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