Introduction

public static void GetTextFromArea()
{
  Console.WriteLine( "=== GET TEXT FROM AN AREA ===" );
  var outputFileName = "GetTextFromArea.pdf";
  var outputPath = TextsSample.TextsSampleOutputDirectory + outputFileName;

  // Loads a PdfDocument.
  using( var pdfInput = PdfDocument.Load( TextsSampleResourcesDirectory + @"Two Page Text Only - from libre office.pdf" ) )
  {
    // Gets the first Page of the input document.
    var page = pdfInput.Pages[ 0 ];

    // Gets the text located in a specific area of the first Page.
    var areaText = page.GetTextFromArea( new Rectangle( 297, 77, 75, 12 ) );

    // Creates an output PdfDocument to display AreaText.
    using( var pdfoutput = PdfDocument.Create( outputPath ) )
    {
      // Gets the first Page of the output document.
      var outputPage = pdfoutput.Pages[ 0 ];

      // Sets the title.
      var titleFont = pdfoutput.Fonts.GetStandardFont( StandardFontType.Helvetica );
      outputPage.AddParagraph( "Get Text From Area", TextStyle.WithFont( titleFont, 15 ), new ParagraphStyle( ParagraphHorizontalAlignment.Center ) );

      // Displays the AreaText.
      var textStyle = TextStyle.WithFont( titleFont, 12 );
      outputPage.AddText( $"The text found in the area (297, 77, 375, 88) is: \"{areaText}\".", new Point( 110, 145 ), textStyle );

      // Saves the output document.
      pdfoutput.Save();
      Console.WriteLine( $"Created: {outputFileName}" );
    }
  }
}