using System;

using System.Linq;

using System.Diagnostics;

using System.Collections.Generic;

public class Program

{

​

    public static void Main()

    { decimal amount = 123.11005M;

        Console.WriteLine((Math.Truncate(1000 * amount) / 1000));

        Console.WriteLine(Math.Round(amount,4));

    }

​

​

}

​

​