using System;

public class Program

{

    public static void Main()

    {

        var apiResponse = string.Format(new System.Globalization.CultureInfo("en-ZA"), "{0}", 10.5);

        Console.WriteLine(apiResponse);

        Console.WriteLine(String.Format(System.Globalization.CultureInfo.InvariantCulture, "{0:N}", apiResponse));

    }

}