using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        decimal a=4.865m;

        Console.WriteLine(a.ToString(("#,0.00")));

        Console.WriteLine(Math.Round(a, 2));

        Console.WriteLine(Math.Round(a, 2, MidpointRounding.AwayFromZero));

    }

}