Rotation C#

        private static Bitmap RotateImage(Image image, PointF offset, float angle)
        {
            var rotatedBmp = new Bitmap(image.Width, image.Height);
            rotatedBmp.SetResolution(image.HorizontalResolution, image.VerticalResolution);
            var g = Graphics.FromImage(rotatedBmp);
            g.TranslateTransform(offset.X, offset.Y);
            g.RotateTransform(angle);
            g.TranslateTransform(-offset.X, -offset.Y);
            g.DrawImage(image, new PointF(0, 0));
            return rotatedBmp;
        }

        private void buttonRotate_Click(object sender, EventArgs e)
        {
            Cursor = Cursors.WaitCursor;

            float angle = (float) Convert.ToDouble(textBoxAngleRotate.Text);
            PointF offset = new PointF((float) Convert.ToSingle(
                textBoxOffsetRotateX.Text) , (float) Convert.ToSingle(textBoxOffsetRotateY.
                Text));
            bmpAsli = (Bitmap)pictureBoxInput.Image;
            bmpHasil = new Bitmap(bmpAsli.Width, bmpAsli.Height);
            bmpHasil = RotateImage(bmpAsli, offset, angle);
            pictureBoxOutput.Image = bmpHasil;

            Cursor = Cursors.Default;
        }