Panel background image flickering

Question

I've a Panel which fills the parent Form.
And I used a Timer to capture screen ,
and set the screenshot as background image of Panel periodically.

However, it runs into crazy flickering. What can I do to solve it?

//Part of code
 public partial class Form1 : Form
    {

        DxScreenCapture sc = new DxScreenCapture();

        public Form1()
        {
            InitializeComponent();

            panelMain.BackgroundImageLayout = ImageLayout.Zoom;
         }

        private void Form1_Load(object sender, EventArgs e)
        {
        }



        void RefreshScreen()
        {
            Surface s = sc.CaptureScreen();

            DataStream ds = Surface.ToStream(s, ImageFileFormat.Bmp);
            panelMain.BackgroundImage = Image.FromStream(ds);

            s.Dispose();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            RefreshScreen();

        }
    }

Answer 1

Try using a double buffered panel. Inherit panel, set DoubleBuffered to true and use that panel instead of default panel:

    namespace XXX
    {
        /// <summary>
        /// A panel which redraws its surface using a secondary buffer to reduce or prevent flicker.
        /// </summary>
        public class PanelDoubleBuffered : System.Windows.Forms.Panel
        {
            public PanelDoubleBuffered()
                : base()
            {
                this.DoubleBuffered = true;
            }
        }
    }

EDIT

Additionally I want to encourage you to take care a little more about the resources you use. Whenever an object implements the IDisposable interface - dispose the object when not needed any more. This is very important when dealing with unmanaged resources, such as streams!

    void RefreshScreen()
    {
            using (Surface s = sc.CaptureScreen())
            {
                using (DataStream ds = Surface.ToStream(s, ImageFileFormat.Bmp))
                {
                    Image oldBgImage = panelMain.BackgroundImage;
                    panelMain.BackgroundImage = Image.FromStream(ds);
                    if (oldBgImage != null)
                        oldBgImage.Dispose();
                }
            }
    }