mtInertia.Picture.GetBitmapBoundary C# (CSharp) Method

        private PointF[] GetBitmapBoundary(Matrix matrix)
        {
            PointF[] bitmapRect = new PointF[] 
            {   new PointF(0, 0), 
                new PointF(_bitmap.Width, 0),
                new PointF(_bitmap.Width, _bitmap.Height),
                new PointF(0, _bitmap.Height)
            };

            matrix.TransformPoints(bitmapRect);

            return bitmapRect;
        }