how to avoid flicker when drawing

[Tetemke Gebre]

I am working with C# graphics .I am drawing with elips.
and I have timer that updates the cordinate of scanning line in every 27 milli second.when I start the timer the line starts sweeping the cirlce but at the same time the panal is also vibrating or flickering , which i don't want to do that.

void t_Tick(object sender, EventArgs e)
        {
            if (conobjcets.START == true)
            {
                label5.Text = conobjcets.elapsedTime;
                
                
                splitContainer2.Panel2.Invalidate();
               

            }

the obove cod is timer func

[PsychoCoder]

A coulple things to try, try DoubleBuffered on your panel like so

this.SetStyle(ControlStyles.AllPaintingInWmPaint |ControlStyles.UserPaint |ControlStyles.DoubleBuffer, true);

Or BufferedGraphic s similar to this

System.Drawing.Graphics g = this.CreateGraphics();
        System.Drawing.BufferedGraphicsContext dc = new BufferedGraphicsContext();
        BufferedGraphics backbuffer = dc.Allocate(g, new Rectangle(new Point(0, 0), g.VisibleClipBounds.Size.ToSize()));
        backbuffer.Graphics.DrawImage(Image.FromFile(@"c:\test.jpg"), new Point(10, 10));
        backbuffer.Render(g