Google Maps Geocoding API: Save Latitude and Longitude of a Location to database in ASP.Net

This is code for searching latitude and longitude . so how to save into database.

function GetLocation() {
            var geocoder = new google.maps.Geocoder();
            var address = document.getElementById("txtAddress").value;
            geocoder.geocode({ 'address': address }, function (results, status) {
                if (status == google.maps.GeocoderStatus.OK) {
                    var latitude = results[0].geometry.location.lat();
                    var longitude = results[0].geometry.location.lng();  
                    var mapOptions = {
                        center: new google.maps.LatLng(latitude, longitude),
                        zoom: 18,
                        mapTypeId: google.maps.MapTypeId.ROADMAP
                    };
                    var infoWindow = new google.maps.InfoWindow();
                    var latlngbounds = new google.maps.LatLngBounds();
                    var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
                } else {
                    alert("Request failed.")
                }
            });
        };

<textarea id="txtAddress" rows="1" cols="20"></textarea>    
    <input type="button" onclick="GetLocation()" value="Get Location" />
    <div id="dvMap" style="width: 100%; height: 500px" align="center">
    </div>