test.cs

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

string stringToFind = "Agreement";

List<ContentLine> contentLines = 
    pdfLines.Find(stringToFind);

foreach (ContentLine line in contentLines) {
    Console.WriteLine("Found string \"{0}\" on page {1} (X: {2}, Y: {3}): {4}",
        stringToFind, 
        line.Page.ToString(), 
        line.X.ToString(), 
        line.Y.ToString(), 
        line.Text);
}