配列運用のキュー

using System;
using System.Collections.Generic;
using System.Text;

namespace Queue
{
    class QueueTest// 
    {
        int[] array;
        int length = 0;// ， 0
        public QueueTest(int num) {
            array = new int[num];// 
        }
        public int Length {// 

            get {
                return this.length;
            }
        
        }

        public void Push(int num) { // 

            if (length > 0)
            {
                for (int i = length - 1; i >= 0; i--)
                {

                    array[i+1] = array[i];
                }

            }
            array[0] = num;
           
            length++;
        }

        public int Pop() {

            //return array[--length];
            return array[--length];
        }

    }

    class Test {
        static void Main(string[] args) {
            
            QueueTest qt = new QueueTest(100);
            
            qt.Push(1);// 
            qt.Push(2);
            qt.Push(3);
            qt.Push(4);
            
            while (qt.Length > 0) {// 

                Console.Write(qt.Pop() + "\t");
            
           }
            Console.Read();
        
        }
    
    }
}