Receiving polygon coordinates drawn by GoogleMaps DrawingManager

I’m trying to receive the coordinates of a polygon drawn by Google Maps API drawing manager.

Background

https://developers.google.com/maps/documentation/javascript/drawinglayer#maps_drawing_tools-javascript

https://developers.google.com/maps/documentation/javascript/reference/polygon#Polygon.getPaths

Javascript

//add listeners
google.maps.event.addListener(drawingManager, ‘polygoncomplete’, function (polygon) {

getDrawnPolygon(polygon);

});
function getDrawnPolygon(polygon) {
//polygon we just drew is here.
var paths = polygon.getPath(); //get an array of latlng

//empty array of latlng objects
var latlngArry = [];

//loop thru the MVCArray<LatLng> and get the value, push to latlngArry
paths.getArray().forEach(function (value, index, array_x) {
console.log(” index: ” + index + ” value: ” + value);
var lat = value.lat;
var lng = value.ln;

var myLatlng = new google.maps.LatLng(lat, lng);
latlngArry.push(myLatlng);//value
});

console.log(“about to push”);
console.log(latlngArry.length);
App.frmCityView.ReceiveDrawnPolygon(latlngArry);

console.log(“done pushing”);
//ask if they are done or want more polygons.

}

C#

[WebMethod]
public void ReceiveDrawnPolygon(LatLng[] obj)
{
AlertBox.Show(obj[0].Lat.ToString());
}

The error I receive is “Object must implement IConvertible”.

I’ve tried using a dynamic as the parameter in the webmethod, and object.  Nothing works.  The array of LatLng is fine on the Javascript side though.  I just can’t push it to the webmethod. Also, the error does not fire in the debugger, even though I am telling it to break on CLR System.InvalidCastException errors.

thanks

Andrew