using HtmlAgilityPack;

using System;

​

public class Program

{

    public static void Main()

    {

        string iata = "GRU"; // Example IATA code

​

        string airportName = GetAirportNameByIATA(iata);

        Console.WriteLine(airportName == String.Empty ? "Airport not found." : airportName);

    }

​

    static string GetAirportNameByIATA(string iata)

    {

        string url = String.Format("https://www.iata.org/PublicationDetails/Search/?currentBlock=314384&currentPage=12572&airport.search={0}", iata);

        try

        {

            var web = new HtmlWeb();

            var doc = web.Load(url);

​

            var rows = doc.DocumentNode.SelectNodes("//table[@class='datatable']//tbody//tr");

​

            if (rows != null)

            {

                foreach (var row in rows)

                {

                    var columns = row.SelectNodes("td");

​

                    if (columns[2].InnerText.Trim() == iata)

                    {

                        return columns[1].InnerText.Trim(); // Return the Airport Name

                    }

                }

            }

​

            return String.Empty; // Return empty if no match is found

        }

        catch (Exception ex)

        {

            Console.WriteLine(String.Format("Error: {0}", ex.Message));

            return null;

        }

    }

}

​