StringFormat sf = this.StringFormat;
//specify alignment
sf.Alignment = DrawManager.TranslateAlignment(this.textAlign);
//specify line alignment
sf.LineAlignment = DrawManager.TranslateLineAlignment(this.textAlign);
//specify RTL
if (dci.RightToLeft)
  sf.FormatFlags |= StringFormatFlags.DirectionRightToLeft;
else
  sf.FormatFlags &= ~StringFormatFlags.DirectionRightToLeft;

//draw
using (Brush foreColorBrush = new SolidBrush(foreColor))
{
  dci.g.DrawString(text, dci.Font, foreColorBrush, (RectangleF)rect, sf);        
}

protected override void PaintTextInCell(CellDrawInfo dci, Brush bkBrush, Color foreColor)
{
  dci.g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
  base.protected virtual void PaintTextInCell(dci, bkBrush, foreColor);
}