title: How to control the orientation of Drawstring?
body: <p>I want to draw a string as an axis label. When I draw the string with following code, I can read it "from the left". The base line of the text is at the left side. </p>
  
  <pre><code>StringFormat format = CustomGraphics.StringFormat(ContentAlignment.MiddleCenter);
  format.FormatFlags |= StringFormatFlags.DirectionVertical;
  e.Graphics.DrawString(this.yAxis.Title.Text, this.yAxis.Title.Font,
                        textBrush, e.Bounds, format);
  format.FormatFlags &amp;= ~StringFormatFlags.DirectionVertical;
  </code></pre>
  
  <p>I want to draw vertical but turn the orientation by 180 degrees. How can I control this? Is there another method that I should use?</p>