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Tip #008

Culture-aware interpolation

C# 6

Code card: Culture-aware interpolation. Program output: $100.00 / 100,00 €

About this tip

FormattableString keeps the values and :C format for rendering with a chosen culture. The fr-FR result has a non-breaking space before €. Interpolate once, format later: a FormattableString keeps the :C format so you render it with any CultureInfo. It is available since C# 6. The key line is FormattableString text = $"{price:C}" in formats.cs. Run it and the output reads $100.00, 100,00 €.

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Code

formats.cs
using System.Globalization;


var price = 100m;
FormattableString text = $"{price:C}";


var usa = CultureInfo.GetCultureInfo("en-US");
var euro = CultureInfo.GetCultureInfo("fr-FR");


Console.WriteLine(text.ToString(usa));
Console.WriteLine(text.ToString(euro));

Output

Output
$ dotnet run formats.cs
$100.00
100,00 €