test.cs

Lines pdfLines = new Lines("lease_agreement.pdf");

string stringToFind = "Agreement";

List<ContentLine> contentLines =
    pdfLines.Find(new RectangleF(72,83, 10, 10), true);

foreach (ContentLine line in contentLines) {
    Console.WriteLine("Found text on page {0} (X: {1}, Y: {2}): {3}",
        line.Page.ToString(),
        line.X.ToString(),
        line.Y.ToString(),
        line.Text);
}