using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        CultureInfo nlBEFormaat = new CultureInfo("nl-BE");

        DateTime Datum = new DateTime(2017, 9, 1);

        int iDatum = Datum.Year;

        Datum = Datum.AddDays(5);

​

        Console.WriteLine(iDatum);      

        Console.WriteLine(Datum.ToString("dd dddd MMMM yyyy", nlBEFormaat));

​

    }

}