Примеры

public void DrawFlippedText(Graphics gr, Font the_font, Brush the_brush, 
    int x, int y, string txt, bool flip_x, bool flip_y)
{
    // Save the current graphics state.
    GraphicsState state = gr.Save();

    // Set up the transformation.
    int scale_x = (flip_x ? -1 : 1);
    int scale_y = (flip_y ? -1 : 1);
    gr.ResetTransform();
    gr.ScaleTransform(scale_x, scale_y);

    // Figure out where to draw.
    SizeF txt_size = gr.MeasureString(txt, the_font);
    if (flip_x)
    {
        x = (int)(-x - txt_size.Width);
    }
    if (flip_y)
    {
        y = (int)(-y - txt_size.Height);
    }

    // Draw.
    gr.DrawString(txt, the_font, the_brush, x, y);

    // Restore the original graphics state.
    gr.Restore(state);

}

private void Form1_Paint(object sender, PaintEventArgs e)
{
    using (Font the_font = new Font("Comic Sans MS", 20))
    {

        DrawFlippedText(e.Graphics, the_font, Brushes.Red, 10, 10, "Flip X", true, false);
        DrawFlippedText(e.Graphics, the_font, Brushes.Green, 10, 100, "Flip Y", false, true);
        DrawFlippedText(e.Graphics, the_font, Brushes.Blue, 10, 200, "Flip XY", true, true);

        // Optional: Draw boxes around the strings.
        SizeF txt_size;

        txt_size = e.Graphics.MeasureString("Flip X", the_font);
        e.Graphics.DrawRectangle(Pens.Red, 10, 10, txt_size.Width, txt_size.Height);

        txt_size = e.Graphics.MeasureString("Flip Y", the_font);
        e.Graphics.DrawRectangle(Pens.Red, 10, 100, txt_size.Width, txt_size.Height);

        txt_size = e.Graphics.MeasureString("Flip XX", the_font);
        e.Graphics.DrawRectangle(Pens.Red, 10, 200, txt_size.Width, txt_size.Height);
    }
}