using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

            var clone = (CultureInfo)CultureInfo.CurrentCulture.Clone();

            clone.NumberFormat.NumberGroupSeparator = ",";

            clone.NumberFormat.NumberDecimalSeparator = ".";

            Console.WriteLine((1500).ToString("N2", clone));

    }

}