private static void AddLineToPreparedTextWithPageCheck(PreparedPagedText ppt, String line, Int32 availableHeight, ref Int32 currentAvailableHeight)
 {
     ppt.AddLineToPage(ppt.CurrentPageNumber, line);
     currentAvailableHeight -= ppt.LineHeight;
     if (currentAvailableHeight < ppt.LineHeight)
     {
         currentAvailableHeight = availableHeight;
         ppt.CurrentPageNumber++;
     }
 }