Queue with Queue Data type, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Create Queue with Queue Data type
           Queue que = new Queue();
           que.Enqueue(2);
           que.Enqueue(4);
           que.Enqueue(6);
           que.Enqueue(8);
           printStack(que);
           que.Dequeue();
           que.Dequeue();
           printStack(que);
       }
       public static void printStack(Queue que){
          Console.WriteLine("\n Queue elements");
           foreach (int i in que) {
            Console.WriteLine(i);
           }
           Console.WriteLine("Number of elements in the stack " + que.Count);
           Console.WriteLine("Does queue contain the number 4 "+ que.Contains(4));
        }
   }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,11 sec, cpu time: 0,08 sec, average memory usage: 13 Mb, average nr of threads: 2, absolute service time: 0,28 sec