using System.Collections.Generic;
using System.Threading.Tasks;
static void Main(string[] args)
Console.Write("Vul in jaar: ");
int Jaar = Convert.ToInt16(Console.ReadLine());
Console.Write("Vul in maand (kan alleen in cijfers): ");
int maand = Convert.ToInt16(Console.ReadLine());
Console.Write("Vul in dag: ");
int dag = Convert.ToInt16(Console.ReadLine());
DateTime FirstDay = new DateTime(Jaar, maand, dag);
string dayofthefirstDay = FirstDay.DayOfWeek.ToString();
Console.WriteLine("De eerste dag van de gekozen maand is:" +dayofthefirstDay+"");