How to extract part of the text from PDF using Itextsharp?

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C#3.5

How to extract part of the text from PDF using Itextsharp?

I am able to extract the entire text from PDF using ItextSharp dll.

string text = string.Empty;

for (int page = 1; page <= 3; page++)
{

text += PdfTextExtractor.GetTextFromPage(pdfReader, page, new LocationTextExtractionStrategy()) + " ";

}


I want to extract the Declaration section and Disclaimer section in my PDF. I don't want to extract the entire text.