private static void ExtractTextFromRegionOfPdf(string sourceFileName)
{
using (Stream pdfStream = new FileStream(sourceFileName, FileMode.Open))
{
PdfReader pdfReader = new PdfReader(pdfStream);
System.util.RectangleJ rect = new System.util.RectangleJ(50, 650, 250, 140);
RenderFilter[] renderFilter = new RenderFilter[1];
renderFilter[0] = new RegionTextRenderFilter(rect);
ITextExtractionStrategy textExtractionStrategy = new FilteredTextRenderListener(new LocationTextExtractionStrategy(), renderFilter);
Console.WriteLine(PdfTextExtractor.GetTextFromPage(pdfReader, 1, textExtractionStrategy));
}
}