如何在c#中将KML转换为WKT？

using SharpKml.Dom;
using SharpKml.Engine;

public class KmlToWktConverter
{
    public string ConvertKmlToWkt(string kmlFilePath)
    {
        KmlFile kmlFile = KmlFile.Load(kmlFilePath);
        Kml kml = kmlFile.Root as Kml;

        if (kml != null)
        {
            Placemark placemark = kml.Flatten().OfType<Placemark>().FirstOrDefault();

            if (placemark != null && placemark.Geometry != null)
            {
                GeometryConverter converter = new GeometryConverter();
                string wkt = converter.Convert(placemark.Geometry);

                return wkt;
            }
        }

        return null;
    }
}

KmlToWktConverter converter = new KmlToWktConverter();
string kmlFilePath = "path/to/your/kml/file.kml";
string wkt = converter.ConvertKmlToWkt(kmlFilePath);

if (wkt != null)
{
    Console.WriteLine("WKT: " + wkt);
}
else
{
    Console.WriteLine("Failed to convert KML to WKT.");
}