Example for https://stackoverflow.com/questions/51777962/bug-with-nests-polygonshape

Example.cs

// Using NEST 6.2.0 with NEST.JsonNetSerializer 6.2.0

private static void Main()
{
    var defaultIndex = "documents";
	var pool = new SingleNodeConnectionPool(new Uri("http://localhost:9200"));

    var connectionSettings = new ConnectionSettings(pool, new InMemoryConnection(), (builtin, settings) => 
    new JsonNetSerializer(builtin, settings, contractJsonConverters: new JsonConverter[] { new StringEnumConverter() }))
        .DefaultIndex(defaultIndex)
        .DisableDirectStreaming()
        .PrettyJson()
        .OnRequestCompleted(callDetails =>
        {
            if (callDetails.RequestBodyInBytes != null)
            {
                Console.WriteLine(
                    $"{callDetails.HttpMethod} {callDetails.Uri} \n" +
                    $"{Encoding.UTF8.GetString(callDetails.RequestBodyInBytes)}");
            }
            else
            {
                Console.WriteLine($"{callDetails.HttpMethod} {callDetails.Uri}");
            }

            Console.WriteLine();

            if (callDetails.ResponseBodyInBytes != null)
            {
                Console.WriteLine($"Status: {callDetails.HttpStatusCode}\n" +
                         $"{Encoding.UTF8.GetString(callDetails.ResponseBodyInBytes)}\n" +
                         $"{new string('-', 30)}\n");
            }
            else
            {
                Console.WriteLine($"Status: {callDetails.HttpStatusCode}\n" +
                         $"{new string('-', 30)}\n");
            }
        });

    var client = new ElasticClient(connectionSettings);
    
    var doc = new MyDocument(1)
    {
        Polygon = new PolygonGeoShape(new[] {
            new[] 
            { 
                new GeoCoordinate(1, 2), 
                new GeoCoordinate(3, 4) 
            }
        })
    };
    
    client.IndexDocument(doc);
}

public class MyDocument 
{
    public MyDocument(int id) => Id = id;
    
    public int Id { get; set; }  
    
    public PolygonGeoShape Polygon { get; set; }
}

/*
outputs

PUT http://localhost:9200/documents/mydocument/1?pretty=true 
{
  "id": 1,
  "polygon": {
    "coordinates": [
      [
        [
          2.0,
          1.0
        ],
        [
          4.0,
          3.0
        ]
      ]
    ],
    "type": "polygon"
  }
}

Status: 200

------------------------------
*/