windows phone 7 - Error in http request -

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i'm making http request google.com. way i'm doing it:

    httptestwebrequest = (httpwebrequest)system.net.webrequest.create("http://www.google.com/");     httptestwebrequest.method = "get";     httptestwebrequest.begingetresponse(gethttptestresponse, httptestwebrequest);  ...  private void gethttptestresponse(iasyncresult asynchronousresult) {     var webrequest = (httpwebrequest)asynchronousresult.asyncstate;     webresponse response =((httpwebrequest)asynchronousresult.asyncstate).endgetresponse(asynchronousresult);     ... }

with fiddler gives me http 302 moved status code, in app throws me exception , don't redirects new location of website.

any ideas why happening?

update 1

im getting nullreferenceexception.

the stack trace is:

at system.net.browser.httpwebrequesthelper.removehttponlycookies(uri requesturi, string setcookieheadervalue)
@ system.net.browser.httpwebrequesthelper.parseheaders(uri requesturi, securitycriticaldataformultiplegetandset`1 headers, webheadercollection collection, boolean removehttponlycookies, httpstatuscode& status, string& statusdescription)
@ system.net.browser.clienthttpwebrequest.progress(object sender, eventargs e)
@ ms.internal.coreinvokehandler.invokeeventhandler(int32 typeindex, delegate handlerdelegate, object sender, object args)
@ ms.internal.jolthelper.fireevent(intptr unmanagedobj, intptr unmanagedobjargs, int32 argstypeindex, int32 actualargstypeindex, string eventname)

try setting httptestwebrequest.allowautoredirect = true;


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