VectorTileLayerExtensions.cs

using GeoJSON.Net.Feature;

namespace Mapbox.Vector.Tile
{

    public static class VectorTileLayerExtensions
    {
        public static FeatureCollection ToGeoJSON( this VectorTileLayer vectortileLayer, int x, int y, int z )
        {
            var featureCollection = new FeatureCollection();

            foreach (var feature in vectortileLayer.VectorTileFeatures)
            {
                var geojsonFeature = feature.ToGeoJSON(x,y,z);
                if (geojsonFeature.Geometry != null)
                {
                    featureCollection.Features.Add( geojsonFeature );
                }
            }
            return featureCollection;
        }
    }

}