WebService Implemented 

WebService implemented in GeoCodeAPI.cs
external libraries used :
using JsonUtils;
using Newtonsoft.Json;

Please have a look.
WebServer and WebService both running in parallel.
I have also handled multiple reponses from Google
Sample output :
[{"Lattitude":18.54515,"Longitude":73.884236},{"Lattitude":18.545219,"Longitude":73.885144}]