避免一次又一次地创建PictureBoxes

Question

我有以下问题.我的目的是在Windows窗体中从右向左移动多个图像.下面的代码非常好用.令我困扰的是,每次创建PictureBox对象时,此过程都会占用大量内存.每个图像从右到左不间断地跟随前一图像.图像显示从一侧移动到另一侧的天空.它应该看起来像一架飞机在空中飞舞.

如何避免使用太多内存？我可以用PaintEvent和GDI做些什么吗？我对图形编程不太熟悉.

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Collections.Generic;

public class Background : Form
    {

        private PictureBox sky, skyMove;
        private Timer moveSky;
        private int positionX = 0, positionY = 0, width, height;
        private List<PictureBox> consecutivePictures;


        public Background(int width, int height)
        {

            this.width = width;
            this.height = height;

            // Creating Windows Form
            this.Text = "THE FLIGHTER";
            this.Size = new Size(width, height);
            this.StartPosition = FormStartPosition.CenterScreen;
            this.FormBorderStyle = FormBorderStyle.FixedSingle;
            this.MaximizeBox = false;


            // The movement of the sky becomes possible by the timer.
            moveSky = new Timer();
            moveSky.Tick += new EventHandler(moveSky_XDirection_Tick);
            moveSky.Interval = 10;
            moveSky.Start();


            consecutivePictures = new List<PictureBox>();



            skyInTheWindow();

            this.ShowDialog();

        }

        // sky's direction of movement
        private void moveSky_XDirection_Tick(object sender, EventArgs e)
        {

            for (int i = 0; i < 100; i++)
            {
                skyMove = consecutivePictures[i];

                skyMove.Location = new Point(skyMove.Location.X - 6, skyMove.Location.Y);

            }


        }

        private void skyInTheWindow()
        {

            for (int i = 0; i < 100; i++)
            {
                // Loading sky into the window
                sky = new PictureBox();
                sky.Image = new Bitmap("C:/MyPath/Sky.jpg");
                sky.SetBounds(positionX, positionY, width, height);
                this.Controls.Add(sky);

                consecutivePictures.Add(sky);

                positionX += width;
            }   

        }

    }