Automatically rotate pages of a multipage TIFF file using OCR and C#

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// We assume that GdPicture has been correctly installed and unlocked.
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string filepath = "multipage.tif";
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string destpath = "output.tif";
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string DICT_PATH = "C:\\GdPicture.NET 14\\Redist\\OCR"; // Specify your path.
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OCRLanguage LANG = OCRLanguage.English; // Specify your language.
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GdPictureStatus status;
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using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
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{
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   bool hasRotation = false;
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   int imageID = gdpictureImaging.CreateGdPictureImageFromFile(filepath);
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   status = gdpictureImaging.GetStat();
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   if (status == GdPictureStatus.OK)
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   {
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    int pageCount = gdpictureImaging.GetPageCount(imageID);
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    for (int i = 1; i <= pageCount; i++)
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    {
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     status = gdpictureImaging.SelectPage(imageID, i);
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     if (status == GdPictureStatus.OK)
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     {
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      using (GdPictureOCR gdpictureOCR = new GdPictureOCR())
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      {
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         gdpictureOCR.ResourceFolder = DICT_PATH;
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         gdpictureOCR.AddLanguage(LANG);
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         status = gdpictureOCR.SetImage(imageID);
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         int pageRotation = gdpictureOCR.GetOrientation();
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         if (pageRotation != 0)
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         {
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          hasRotation = true;
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          status = gdpictureImaging.RotateAngle(imageID, 360 - pageRotation);
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         }
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      }
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     }
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     if (status != GdPictureStatus.OK)
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     {
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      MessageBox.Show("Error: " + status, "Rotation + OCR Example", MessageBoxButtons.OK, MessageBoxIcon.Error);
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      break;
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     }
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    }
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    if (status == GdPictureStatus.OK)
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    {
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     if (hasRotation)
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     {
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      status = gdpictureImaging.TiffSaveMultiPageToFile(imageID, destpath, TiffCompression.TiffCompressionAUTO);
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      if (status == GdPictureStatus.OK)
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         MessageBox.Show("Done!", "Rotation + OCR Example", MessageBoxButtons.OK, MessageBoxIcon.Information);
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      else
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         MessageBox.Show("Error: " + status, "Rotation + OCR Example", MessageBoxButtons.OK, MessageBoxIcon.Error);
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     }
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     else
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     {
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      System.IO.File.Copy(filepath, destpath);
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     }
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    }
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    gdpictureImaging.ReleaseGdPictureImage(imageID);
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   }
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}