Extract Text from PDF in C# | https://docs.conholdate.com/net/extract-text-from-pdf/

extract-text-from-pdf.cs

using(Parser parser = new Parser(filePath))
{
    // Extract a text into the reader
    using(TextReader reader = parser.GetText())
    {
        // Print a text from the document
        // If text extraction isn't supported, a reader is null
        Console.WriteLine(reader == null ? "Text extraction isn't supported" : reader.ReadToEnd());
    }
}

Read complete article here: https://docs.conholdate.com/net/extract-text-from-pdf/