This sample show a how to render polygons to the map. The shape above is showing the path of William Kingsford Smith's first trans-Pacific flight between Oakland, CA, and Brisbane, Australia.

@(
    Html.GoogleMap()
        .Name("map")
        .Height(500)
        .Center(c => c.Latitude(0)
                      .Longitude(-180))
        .Zoom(3)
        .Polylines(pf => pf.Add()
                        .Points(ptn =>
                        {
                            ptn.Add(37.772, -122.214);
                            ptn.Add(21.291, -157.821);
                            ptn.Add(-18.142, 178.431);
                            ptn.Add(-27.467, 153.027);
                        })
                        .FillColor(Color.Blue)
                        .StrokeColor(Color.DarkBlue)
                  )

)