Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Syntra.AddressCard
{
    class Program
    {
        static void Main(string[] args)
        {
            // user input
            Console.WriteLine("Gelieve een design karakter te kiezen (vb *, #, ...)");
            char designCharacter = Convert.ToChar(Console.ReadLine());

            Console.WriteLine("Gelieve je gegevens te vervolledigen");
            Console.Write("Voornaam: ");
            string firstName = Console.ReadLine();

            Console.Write("Familienaam: ");
            string lastName = Console.ReadLine();

            Console.Write("Adres: ");
            string address = Console.ReadLine();

            Console.Write("Postcode: ");
            string zipCode = Console.ReadLine();

            Console.Write("Plaats: ");
            string town = Console.ReadLine();

            /*
            var myResult = "Hello " + 12;
            var mySecondResult = myResult + 15;
            */

            // output
            Console.WriteLine();
            Console.WriteLine(designCharacter.ToString() + " " + (designCharacter + designCharacter));
            Console.WriteLine(designCharacter + "\t" + "Voornaam\t: " + firstName);
            Console.WriteLine(designCharacter + "\t" + "Familienaam\t: " + lastName);
            Console.WriteLine(designCharacter + "\t" + "Adres\t\t: " + address);
            Console.WriteLine(designCharacter + "\t" + "Postcode\t: " + zipCode);
            Console.WriteLine(designCharacter + "\t" + "Plaats\t\t: " + town);
            Console.WriteLine(designCharacter + designCharacter + designCharacter);

            Console.ReadKey();
        }
    }
}