/// <summary>
/// rotated image
/// </summary>
public void rotation(int angleDeRotation)
{
    switch(angleDeRotation)
    {
        case 90 : theImage.RotateFlip(RotateFlipType.Rotate90FlipXY); break;
        case 180 : theImage.RotateFlip(RotateFlipType.Rotate270FlipXY); break;
        default : theImage.RotateFlip(RotateFlipType.RotateNoneFlipX); break;
    }
}

/// <summary>
/// distorts 3D
/// </summary>
public void fausse3D()
{
    Point[] pts =
    {
        new Point(65, 65),// dot creatre with X et Y
        new Point(300, 0),
        new Point(400, 400)
    };
    // to create the new image in which one will make the treatment
    Bitmap tempImage = new Bitmap( monImage.Width,
    monImage.Height, monImage.PixelFormat);
    Graphics g = Graphics.FromImage(tempImage);
   // prime coat
    g.Clear(System.Drawing.Color.White);
   // executions of the effect
    g.DrawImage(monImage,
    pts);
   // dispose les ressources
    g.Dispose();
    monImage.Dispose();
   // one attribute the new image in that of origin
    monImage = tempImage;
}

private void rotation1_Click(object sender, System.EventArgs e)
{
   String path = ImageButton1.ImageUrl.Replace("file:///","").ToString();

// instanciation of the class traitementImage
   traitementImage monImage = new traitementImage();
// load image
   monImage.chargementImage(path);
// call the method and one passes in parameter is 90,180 or 0
   monImage.rotation(90);
   String nouveaNom = Server.MapPath(Request.ApplicationPath) + "/miniaturePhoto.JPG";

// save as image under a new name
   monImage.SaveImageAs(nouveaNom);
// reloads the image in the page
   Imagebutton2.ImageUrl = Server.MapPath(Request.ApplicationPath) + "/miniaturePhoto.JPG";
}

private void rotation1_Click(object sender, System.EventArgs e)
{
   String path = ImageButton1.ImageUrl.Replace("file:///","").ToString();

// instanciation of the class traitementImage
   traitementImage monImage = new traitementImage();
// loading of the image
   monImage.chargementImage(path);
// call the method 3d is distorted
   monImage.fausse3D();
   String nouveaNom = Server.MapPath(Request.ApplicationPath) + "/miniaturePhoto.JPG";

// recording of the image under a new name
   monImage.SaveImageAs(nouveaNom);
// reloads the image in the page
   Imagebutton2.ImageUrl = Server.MapPath(Request.ApplicationPath) + "/miniaturePhoto.JPG";
}