Geojson.net2

Summary

Geojson.net2 is an alternative library for transforming a C# object into a Geojson Object

Installation

To start using this libraty all you have to do is install the GeoJSON.Net2 NuGet package:

PM> Install-Package GeoJson.net2

How to use it

Example: Just create a geojson object (Point, Polygon or LineString) and pass a coordinates list as an argument.

public Geojson MyPolygon ()

       {

           List<LatLng> Coordinates = new List<LatLng>();
           Coordinates.Add(new LatLng(41.02135510866602, -471.06079101562506));
           Coordinates.Add(new LatLng(45.01141864227728, -471.06079101562506));
           Coordinates.Add(new LatLng(45.01141864227728, -464.08447265625));
           Coordinates.Add(new LatLng(41.02135510866602, -464.08447265625));
           Coordinates.Add(new LatLng(41.02135510866602, -471.06079101562506));

           return new Polygon(Coordinates);
       }

you can send the geojson object as an ajax result and use it in your js code, or if you prefer it you can use Newtonsoft.Json to serialize it and get this result:

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              -471.06079101562506,
              41.021355108666022
            ],
            [
              -471.06079101562506,
              45.011418642277278
            ],
            [
              -464.08447265625,
              45.011418642277278
            ],
            [
              -464.08447265625,
              41.021355108666022
            ],
            [
              -471.06079101562506,
              41.021355108666022
            ]
          ]
        ]
      },
      "properties": {
        "FeatureType": "Polygon",
        "Color": "#3289c7"
      }
    }
  ]
}

Thank you!