Webview Add User Agent

Hi everybody,

I have a little problem.

I want to make hybridapp so i added webview and custom renderer (webviewrenderer)

I want to add user agent before load start. Actually, i made it but in web page i clicked the button and route another page (for example. www.something.com/pcclient to www.something.com/pcclient/login.php) user agent header was not appear.

WebVeiwRenderer Class Code:

` partial void Load( Uri uri)
{
if (uri != null)
{

            NSDictionary dictionary = NSDictionary.FromObjectsAndKeys (new NSObject[1]{NSObject.FromObject("Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25")},new NSObject[1]{NSObject.FromObject("Sub-Agent")});
            NSUserDefaults.StandardUserDefaults.RegisterDefaults (dictionary);

            var req=new NSMutableUrlRequest(new NSUrl(uri.AbsoluteUri));
            req.Headers=dictionary;

            this._webView.LoadRequest(req);
        }
    }

`

And i've tried this:

`private bool HandleStartLoad( UIWebView webView, NSUrlRequest request, UIWebViewNavigationType navigationType)
{

        if(UIWebViewNavigationType.FormSubmitted==navigationType)
        {
                        Load(request.Url.RelativeString);
            Debug.WriteLine ("FormSubmitted Clicked");
        }

        return ! this.CheckRequest(request.Url.RelativeString);
    }`

` protected override void OnElementChanged(ElementChangedEventArgs e)
{
base.OnElementChanged(e);

        if ( this._webView == null)
        {
            this._webView = new UIWebView();
            this._webView.LoadFinished += LoadFinished;
            this._webView.ShouldStartLoad += this.HandleStartLoad;

            this.InjectNativeFunctionScript();


            this.SetNativeControl( this._webView);

            var wvs = ( UrlWebViewSource)e.NewElement.Source;
            this.Load( new NSUrl(wvs.Url));


        }
        this.Unbind(e.OldElement);
        this.Bind();
    }`

How can i fix this?

By the way i use Xamarin.forms.lab hybridview version="1.2.0-pre3"

Thanks for help.