using System;

public class Program

{

    public static void Main()

    {

        Decimal yourDecimal = 123.666m;

        Decimal yourDecimal1 = 3.333m;

​

        Console.WriteLine(yourDecimal + yourDecimal1);

        decimal summ = yourDecimal + yourDecimal1;

        Console.WriteLine(summ);

        Console.WriteLine("sum" + summ.ToString("0.00"));

        double dd1 = (double)(yourDecimal + yourDecimal1);

        Console.WriteLine(dd1);

        Console.WriteLine(((decimal)dd1).ToString("0.00"));

        Console.WriteLine(dd1.ToString("n"));

        Console.WriteLine(dd1.ToString("N2"));

        Console.WriteLine("test " + dd1.ToString("0.00"));

        double d = (double)yourDecimal;//Convert.ToDouble(yourDecimal);

        Console.WriteLine(d);

    }

}