Load html page with german umlaute into webview?

Hello,

i load a webpage into a string and remove some elements(divs in content). Then i try to show the html page in webview. That works but all german umlaute are shown as "?"

I tried several ways for a few hours but i cant get it working...

Fiddler is showing this as header for the loaded url:

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding: gzip,deflate,sdch
Accept-Language: de-DE,de;q=0.8,en-US;q=0.6,en;q=0.4
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.116 Safari/537.36

The header of the html shows that:

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
        <meta name="robots" content="yes, all, follow,index" />
        <meta name="revisit-after" content="1 days" />
        <meta http-equiv="Content-Language" content="de" />

Im loading it in simplest way like that:

`

   protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

        SetContentView(Resource.Layout.Books);
        var myWebView = FindViewById<WebView>(Resource.Id.webview);
        string url = "http://m.cetpm.de/shop.html?kat=1";

        var url2 = new Uri(url);
        HttpWebRequest http = (HttpWebRequest)WebRequest.Create(url2);
        //headers
        http.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.116 Safari/537.36";
        http.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
        http.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
        http.Headers.Add("Accept-Language", "de-DE,de;q=0.8,en-US;q=0.6,en;q=0.4");
        http.Headers.Add("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.3");

        using (WebResponse response = http.GetResponse()) {
            var reader = new StreamReader(response.GetResponseStream());
            var result = reader.ReadToEnd();

            var wc = new WebViewClient();
            myWebView.SetWebViewClient(wc);
            myWebView.LoadDataWithBaseURL(null, result, "text/html", "utf-8", null); //"utf-8" iso-8859-1
        }


    } 

`

I hope you can help me!

Best reagrds,

Simon