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Vadim D.  
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 More options Jul 2 2012, 5:53 am
From: "Vadim D." <vadi...@gmail.com>
Date: Mon, 2 Jul 2012 02:53:04 -0700 (PDT)
Local: Mon, Jul 2 2012 5:53 am
Subject: Question about OAuthConsumerWpf Sample
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Hi,

I am trying to develop OAuth 2.0 server that will use internal user
authentication and authorization of the client application.
In order to check the server I am using  OAuthConsumerWpf application
provided with the samples.

Everything working just fine until the last stage of the returning the auth
token back to client. The client sends returnUrl to be http://localhost/and then after the process of user authentication and authorization
finishes, the server redirects the response.
The log of the server produces the following:

WebDev.WebServer40.exe Information: 0 : Incoming request received:
EndUserAuthorizationRequest
WebDev.WebServer40.exe Information: 0 : Binding element
DotNetOpenAuth.OAuth2.ChannelElements.TokenCodeSerializationBindingElement
did not apply to message.
WebDev.WebServer40.exe Information: 0 : Binding element
DotNetOpenAuth.OAuth2.ChannelElements.MessageValidationBindingElement
applied to message.
WebDev.WebServer40.exe Information: 0 : Preparing to send
EndUserAuthorizationSuccessAuthCodeResponseAS (2.0) message.
WebDev.WebServer40.exe Information: 0 : Binding element
DotNetOpenAuth.OAuth2.ChannelElements.MessageValidationBindingElement did
not apply to message.
WebDev.WebServer40.exe Information: 0 :
DotNetOpenAuth.Messaging.Bindings.ICryptoKeyStore.GetKeys returned no keys
for bucket "https://localhost/dnoa/oauth_authorization_code" with the
required key length of 256 bits.  A new key will be created
WebDev.WebServer40.exe Information: 0 : Binding element
DotNetOpenAuth.OAuth2.ChannelElements.TokenCodeSerializationBindingElement
applied to message.
WebDev.WebServer40.exe Information: 0 : Sending message:
EndUserAuthorizationSuccessAuthCodeResponseAS
WebDev.WebServer40.exe Information: 0 : Redirecting to
http://localhost/?code=E7dl%21IAAAAJl4CfH60tn5k5PONt4tDaXMg_WOjIOSyEB...

The problem is that no one listens on the port 80, thus the
ClientAuthorizationView embedded in the dialog fails to navigate to the
specified URL. As far as I understand it, I have no control in the
OAuthConsumerWpfon the returnUrl parameter without changing the code of the
client.

Please advice what am I missing and what should be done to fix it.

Thanks in advance
Vadim


 
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Øyvind Sean Kinsey  
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 More options Jul 2 2012, 12:11 pm
From: Øyvind Sean Kinsey <oyv...@kinsey.no>
Date: Mon, 2 Jul 2012 09:11:57 -0700
Local: Mon, Jul 2 2012 12:11 pm
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Are you trying to use OAuth2 in the context of a desktop application?
If so then you have two main options, have the desktop app rely on a
regular web app to do the token exchange, that way you can use the default
way of exchanging codes/tokens, but this means that you need a secure way
of transferring the token from the server to the app.
The other option is to use the 'native application' profile as described in
http://tools.ietf.org/html/draft-ietf-oauth-v2-28#section-9 combined with
the 'implicit grant' (
http://tools.ietf.org/html/draft-ietf-oauth-v2-28#section-4.2) where you
end up reading the access token out of the user agent in your application.

Alternatively, you implement an extension that lets you retrieve the token
in some other way, eg by using verification codes manually inputted by the
user and so on. An example of this can be found in
https://github.com/AArnott/dotnetopenid/tree/v4.1/samples/OAuthConsum....

Remember, as long as you control the user agent in the application it
doesn't really matter that the redirect_url is not available - you will
still be able to access the url navigated to in order to extract the needed
data.

Øyvind Sean Kinsey
San Francisco, CA


 
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Andrew Arnott  
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 More options Jul 2 2012, 12:51 pm
From: Andrew Arnott <andrewarn...@gmail.com>
Date: Mon, 2 Jul 2012 09:51:03 -0700
Local: Mon, Jul 2 2012 12:51 pm
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Thanks, Oyvind.

Actually the authorization code grant type is an option for native clients,
and I still prefer that approach.  But I think it requires that the native
app set up its own client account with the authorization server, which is
outside the scope of the spec but certainly something that could be done
using DNOA.

--
Andrew Arnott
"I [may] not agree with what you have to say, but I'll defend to the death
your right to say it." - S. G. Tallentyre

On Mon, Jul 2, 2012 at 9:11 AM, Øyvind Sean Kinsey <oyv...@kinsey.no> wrote:


 
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Øyvind Sean Kinsey  
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 More options Jul 2 2012, 1:02 pm
From: Øyvind Sean Kinsey <oyv...@kinsey.no>
Date: Mon, 2 Jul 2012 10:02:12 -0700
Local: Mon, Jul 2 2012 1:02 pm
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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This also requires some extra work at the Authorization Server right? Not
all AS have facilities for 'out of bound' authorization, but if it does or
you are the one building it, then using the code grant is absolutely worth
it.

- Sean

On Mon, Jul 2, 2012 at 9:51 AM, Andrew Arnott <andrewarn...@gmail.com>wrote:


 
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Andrew Arnott  
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 More options Jul 2 2012, 1:33 pm
From: Andrew Arnott <andrewarn...@gmail.com>
Date: Mon, 2 Jul 2012 10:33:33 -0700
Local: Mon, Jul 2 2012 1:33 pm
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Yes, the authorization server must support it.
--
Andrew Arnott
"I [may] not agree with what you have to say, but I'll defend to the death
your right to say it." - S. G. Tallentyre

On Mon, Jul 2, 2012 at 10:02 AM, Øyvind Sean Kinsey <oyv...@kinsey.no>wrote:


 
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Vadim D.  
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 More options Jul 3 2012, 1:52 am
From: "Vadim D." <vadi...@gmail.com>
Date: Mon, 2 Jul 2012 22:52:03 -0700 (PDT)
Local: Tues, Jul 3 2012 1:52 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Thanks you for your answers.

My authorization server supports client registration out-of-band so there
is no problem with it.
I am using *OAuthConsumerWpf *in order to check the server side  and I am
using the Generic 2.0 tab with the following parameters:

   - Grant type - Authorization Code
   - Token Endpoint - http://localhost:42411/OAuth/Token
   - User Authorization URL - http://localhost:42411/OAuth/Authorize

I have stepped in into the *ClientAuthorizationView *source code in order
to understand how the interception of the navigation happens and so it
happens every time the event *WebBrowser1_Navigating* is pumped up. But
somehow, when I have redirection from the AS with the code, the embedded
browser pups up the event with wrong URL, so function *SignificantlyEqual *is
always false.

If I put a breakpoint on *ProcessLocationChanged *in class *
ClientAuthorizationView*, these are the URLs I am getting:

   -
   http://localhost:42411/OAuth/Authorize?client_id=CADC23ED-57BD-4342-B... this is the request for the authorization of the client with the callback

   <http://localhost:42411/OAuth/Authorize?client_id=CADC23ED-57BD-4342-B...>
   -
   http://localhost:42411/Account/LogOn?ReturnUrl=%2fOAuth%2fAuthorize%3... this is ASP.NET forms redirection to user login page

   <http://localhost:42411/Account/LogOn?ReturnUrl=%2fOAuth%2fAuthorize%3...>
   -
   http://localhost:42411/OAuth/Authorize?client_id=CADC23ED-57BD-4342-B... this is the page which asks the user to grant authorization to the client

   <http://localhost:42411/OAuth/Authorize?client_id=CADC23ED-57BD-4342-B...>
   - http://localhost:42411/OAuth/AuthorizeResponse - this is the page
   which processes the authorization grant and creating the token code
   <http://localhost:42411/OAuth/AuthorizeResponse>

The problem is that tha last URL should be the client's callback URL and
it's never received by the embedded browser, although the server sent
redirection in method *AuthorizeResponse*, where the code
is checking the client, checking the scope, adding new authorization to the
DB and then returning with:

*response =
_authorizationServer.PrepareApproveAuthorizationRequest(pendingRequest,
User.Identity.Name);
return
_authorizationServer.Channel.PrepareResponse(response).AsActionResult();*

I will try to install Fiddler the check what is returned from the server,
but it looks very strange to me.

Vadim

...

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Vadim D.  
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 More options Jul 3 2012, 2:48 am
From: "Vadim D." <vadi...@gmail.com>
Date: Mon, 2 Jul 2012 23:48:34 -0700 (PDT)
Local: Tues, Jul 3 2012 2:48 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Very strange, but after installing and running Fiddler everything started
to work ... I have checked again without Fiddler - not working

...

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Vadim D.  
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 More options Jul 3 2012, 9:49 am
From: "Vadim D." <vadi...@gmail.com>
Date: Tue, 3 Jul 2012 06:49:57 -0700 (PDT)
Local: Tues, Jul 3 2012 9:49 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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I have continued to run the Fiddler and now I have another strange problem
- I have server side exception in Token action that the client is not
authenticated.
I have checked the reason and found that this is happening while server
tries to authenticate the client from HTTP headers.

The problem is that .NET framework does not send this header when you do
something like:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(...);
request.Credentials = new NetworkCredential("username", "password");

but instead it waits for server to reply with 401 and WWW-Authenticate<http://freesoft.org/CIE/RFC/1945/65.htm>header presented - only after this the proper authentication header will be
sent.
So it seems to me that I have to change somehow the Token action to require
client authentication (your example of the server does not contains this)

Vadim

...

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Andrew Arnott  
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 More options Jul 5 2012, 12:14 pm
From: Andrew Arnott <andrewarn...@gmail.com>
Date: Thu, 5 Jul 2012 09:14:57 -0700
Local: Thurs, Jul 5 2012 12:14 pm
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Yes, .NET makes it extremely difficult to include an HTTP Authorization
header in the initial request and requires the authenticate challenge
response first.

Support for HTTP Basic client authentication is new in DNOA v4.1.  The MVC
controller in the authorization server sample doesn't have an [Authorize]
attribute because DNOA handles it internally.  If you step through the
OAuthClient and OAuthAuthorizationServer samples together, you'll see the
first request come in, get rejected with the error, and the client will
automatically retry applying the client credentials in the Authorization
header.  This is how your app should presumably work as well.

Alternatively you can simply use the old style method of applying client id
and secret inside your POST payload, but OAuth 2 strongly discourages this.

--
Andrew Arnott
"I [may] not agree with what you have to say, but I'll defend to the death
your right to say it." - S. G. Tallentyre

...

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weblivz  
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 More options Jul 5 2012, 12:23 pm
From: weblivz <webl...@hotmail.com>
Date: Thu, 5 Jul 2012 09:23:48 -0700 (PDT)
Local: Thurs, Jul 5 2012 12:23 pm
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Might I suggest you look at the System.Net.Http namespace on ASP.NET MVC4.i

Allows you to do something like this:

            string authInfo = "myusername" + ":" + "mypassword";
            authInfo =
Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));

            var httpClient = new HttpClient()
            {
                BaseAddress = new
Uri(System.Configuration.ConfigurationManager.AppSettings["Domain"])
            };

            // set the oauth info
            httpClient.DefaultRequestHeaders.Authorization = new
System.Net.Http.Headers.AuthenticationHeaderValue("Basic", authInfo);

I've used this over TLS to do basic auth on a recent project - works well
but it's one of the things i'm looking to do with DotNetOpenAuth in the
coming week or so if i get time so not sure what kind of work would be
needed.

/steven

...

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Andrew Arnott  
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 More options Jul 5 2012, 12:41 pm
From: Andrew Arnott <andrewarn...@gmail.com>
Date: Thu, 5 Jul 2012 09:41:06 -0700
Local: Thurs, Jul 5 2012 12:41 pm
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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DNOA still targets .NET 3.5, so it can't take a dependency on a .NET 4.0
class like HttpClient, if I understand what you're proposing correctly.
 However there are specific DNOA builds that support #ifdef around code
that might allow DNOA to use HttpClient when specifically building against
.NET 4.0.  Another option may be to implement your own
IDirectWebRequestHandler, in which case your implementation can use
HttpClient and then since DNOA will use your handler instead of its own
internal default it will work the way you want.

On the other hand, you could keep doing it the way the samples do and it
already works, just with an extra round trip.

--
Andrew Arnott
"I [may] not agree with what you have to say, but I'll defend to the death
your right to say it." - S. G. Tallentyre

...

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Vadim D.  
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 More options Jul 8 2012, 11:24 am
From: "Vadim D." <vadi...@gmail.com>
Date: Sun, 8 Jul 2012 08:24:47 -0700 (PDT)
Local: Sun, Jul 8 2012 11:24 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Thanks for the answer. I prefer not to change the client side.

What I did what to add the [RequireBasicAuthentication] attribute and
implement it this way:

[AttributeUsage(AttributeTargets.Method)]
    public sealed class RequireBasicAuthentication : FilterAttribute,
IAuthorizationFilter
    {        
        public void OnAuthorization(AuthorizationContext filterContext)
        {
            var req = filterContext.HttpContext.Request;
            if (String.IsNullOrEmpty(req.Headers["Authorization"]))
            {
                filterContext.Result = new ContentResult() { Content = "Not
Authorized"};
                var res = filterContext.HttpContext.Response;
                res.StatusCode = 401;
                res.AddHeader("WWW-Authenticate", "Basic
realm=\"XXXXXXXXXXXX\"");
                res.End();                
            }
        }
    }

Now it's working just fine without changing client side code.
I am stil struggling with the issue that somehow the WPF client supplied
with the samples works only while Fiddler is on ... Without fiddler I am
getting the error page in embedded browser control

...

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Andrew Arnott  
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 More options Aug 31 2012, 7:41 pm
From: Andrew Arnott <andrewarn...@gmail.com>
Date: Fri, 31 Aug 2012 16:40:56 -0700
Local: Fri, Aug 31 2012 7:40 pm
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Hi James,

You've brought up an interesting point.  Yes, if the nonce appears twice,
the first in a message without authentication and the second in a message
with it, then it seems the nonce should only be "consumed" the second time.
 The fact that DNOA is consuming it both times sounds problematic.  I don't
know why the sample is working in this case either.  It's worth looking
more into.  Do you have cycles to debug into it?

--
Andrew Arnott
"I [may] not agree with what you have to say, but I'll defend to the death
your right to say it." - S. G. Tallentyre

On Fri, Aug 31, 2012 at 10:10 AM, James Andersen <james.j.ander...@gmail.com

...

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James Andersen  
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 More options Sep 4 2012, 12:36 am
From: James Andersen <james.j.ander...@gmail.com>
Date: Mon, 3 Sep 2012 21:36:52 -0700 (PDT)
Local: Tues, Sep 4 2012 12:36 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Hmm...  Haven't entirely gotten to the bottom of this but on the reason why
the DatabaseKeyNonceStore ISN'T failing as one would expect, it appears to
be that OAuthAuthorizationServer\Global.asax.cs stores the
DataClassesDataContext in HttpContext.Current.Items["DataContext"] which is
kept only during an HTTP request<http://msdn.microsoft.com/en-us/library/system.web.httpcontext.items....>.
 I'm not sure if that was the intent or if the intent was to keep the
context in say HttpContext.Current.Cache so it's available across requests
(that where I've kept my custom implementation which surfaced this problem
for me).  In any case, my best guess right now is that the
non-authenticated and authenticated requests to the token endpoint are
spinning up two threads with two instances of the DataContext and the
second request isn't quite aware of the first one...   again, not really
sure at this point (was just poking at it while watching a movie).

However, assuming the issue with the INonceStore is straightened out,
requests to the DNOA token endpoint in the sample would presumably start
failing as replay attacks.   Is there a simple way to avoid calling into
StoreNonce until the incoming request message has been checked for
authorization? (I'm a newbie to DNOA so not really familiar with the
pipeline...)  I could open a bug for this if that's useful.

...

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Andrew Arnott  
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 More options Sep 4 2012, 10:16 am
From: Andrew Arnott <andrewarn...@gmail.com>
Date: Tue, 4 Sep 2012 07:15:46 -0700
Local: Tues, Sep 4 2012 10:15 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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James,

Thanks for the investigation.  It sounds like as you say the sample is
buggy.  Then DNOA has a bug that it shouldn't call StoreNonce until the
request has been otherwise authorized.  This is a bug within the assembly
-- not with your configuration.  Can you please file a
bug<http://bit.ly/dnoawish>with all this information?

Thanks.
--
Andrew Arnott
"I [may] not agree with what you have to say, but I'll defend to the death
your right to say it." - S. G. Tallentyre

On Mon, Sep 3, 2012 at 9:36 PM, James Andersen
<james.j.ander...@gmail.com>wrote:

...

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James Andersen  
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 More options Sep 4 2012, 10:58 am
From: James Andersen <james.j.ander...@gmail.com>
Date: Tue, 4 Sep 2012 07:58:36 -0700 (PDT)
Local: Tues, Sep 4 2012 10:58 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Done -  Issue  <https://github.com/DotNetOpenAuth/DotNetOpenAuth/issues/195>
*#195 <https://github.com/DotNetOpenAuth/DotNetOpenAuth/issues/195>.    *Thanks
for the responsiveness!  If I do get some more time I might look into the
issue with the sample further; I'm probably less qualified to tackle the
issue with INonceStore.StoreNonce being called twice at this point ;-)

...

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James Andersen  
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 More options Sep 19 2012, 1:43 am
From: James Andersen <james.j.ander...@gmail.com>
Date: Tue, 18 Sep 2012 22:43:16 -0700 (PDT)
Local: Wed, Sep 19 2012 1:43 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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I've done a bit more debugging on why the sample ISN'T failing and noted my
findings in the github issue.   Briefly, it looks like the unauthenticated
request causes the error handler in the ASP.NET pipeline to trigger which
rolls back the transaction on which INonceStore.StoreNonce attempts to
write the nonce the first time.   This implementation of INonceStore
happens to accommodate the challenge/response flow well because of the
rollback but it seems like a fortunate kludge as other implementations of
INonceStore (like the in-memory one I was playing with earlier) would fail.

...

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Andrew Arnott  
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 More options Sep 21 2012, 12:30 am
From: Andrew Arnott <andrewarn...@gmail.com>
Date: Thu, 20 Sep 2012 21:29:55 -0700
Local: Fri, Sep 21 2012 12:29 am
Subject: Re: [dotnetopenauth] Question about OAuthConsumerWpf Sample
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Ah yes, the transaction rollback sounds very likely why this bug was
hidden.  Thanks for adding to the bug.  We'll get this fixed soon, I hope.

--
Andrew Arnott
"I [may] not agree with what you have to say, but I'll defend to the death
your right to say it." - S. G. Tallentyre

On Tue, Sep 18, 2012 at 10:43 PM, James Andersen <james.j.ander...@gmail.com

...

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