Develop Reference

ObjectDisposedException SslStream and TcpClient

I am using a TcpClient with an SslStream. In general everything works fine but we are getting occasional logs of crashes. It seems to be coming from unstable network connections, and I'm unfortunately not able to reproduce it locally despite trying to create "unexpected circumstances":
using Fiddler to replicate a very slow network connection
killing the server application while its sending data
disconnecting network cables
The situation is this:
I call BeginRead like this:
_tcpClientStream.BeginRead(receiveBuffer, 0, receiveBuffer.Length, pfnCallBack, null);
And then EndRead is being called like this:
iRx = _tcpClientStream.EndRead(asyn);
The only place that the iRx is used is to copy the received data to a new array:
var bytes = new byte[iRx];
Array.Copy(receiveBuffer, bytes, iRx);
In the OnDataReceived callback function, I call EndRead on the SslStream, which throws an exception that is handled:
Error in OnDataReceived System.IO.IOException: The read operation failed, see inner exception. ---> System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: size
at System.Net.Sockets.NetworkStream.BeginRead(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
at System.Net.FixedSizeReader.StartReading()
at System.Net.FixedSizeReader.ReadCallback(IAsyncResult transportResult)
--- End of inner exception stack trace ---
at System.Net.Security._SslStream.EndRead(IAsyncResult asyncResult)
at System.Net.Security.SslStream.EndRead(IAsyncResult asyncResult)
at XXXXXXX.OnDataRecevied(IAsyncResult asyn)
Normally this is not a problem - this exception is caught and the TcpClient is closed and re-initiated to attempt to reconnect.
However, in this case there is a second Exception that is thrown and comes from one of the UnhandledException error handlers:
AppDomain.CurrentDomain.UnhandledException
Current.DispatcherUnhandledException
Current.Dispatcher.UnhandledException
TaskScheduler.UnobservedTaskException
This stack trace is like this:
System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.Net.Sockets.NetworkStream'.
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
at System.Net.FixedSizeReader.ReadCallback(IAsyncResult transportResult)
at System.Net.LazyAsyncResult.Complete(IntPtr userToken)
at System.Net.ContextAwareResult.CompleteCallback(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Net.ContextAwareResult.Complete(IntPtr userToken)
at System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)
at System.Net.Sockets.BaseOverlappedAsyncResult.CompletionPortCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)
Our handling for this type of unhandled error is to display a message to the user that there is a fatal error and the software has to close.
My questions are:
Has anyone ever seen this error before and been able to reproduce the exact out of range exception I'm getting? Despite my attempts to recreate the issue (using the methods described above), I'm not able to ever recreate the exception, it is always the more standard Socket IO exception:
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
--- End of inner exception stack trace ---
at System.Net.Security._SslStream.EndRead(IAsyncResult asyncResult)
at System.Net.Security.SslStream.EndRead(IAsyncResult asyncResult)
at XXXXXXXXX.OnDataRecevied(IAsyncResult asyn)
Is there any way I can handle this exception in my Socket code or is it always going to appear in one of these UnhandledException events? If so, what is the best practice way of handling this? Basically I need some logic in the event handler to identify that the software should not shut down if this specific error is received?

P/Invoke CryptUnprotectData breaks SqlConnection constructor

I'm attempting to use CryptUnprotectData to read a password protected using CryptProtectData into a SecureString and use that to connect to a database. I can get the correct password out, but trying to create a new SqlConnection after that fails with the following:
System.TypeInitializationException was unhandled
HResult=-2146233036
Message=The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception.
Source=System.Data
TypeName=System.Data.SqlClient.SqlConnection
StackTrace:
at System.Data.SqlClient.SqlConnection..ctor()
at System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential)
at System.Data.SqlClient.SqlConnection..ctor(String connectionString)
at ProtectedSqlTest.Program.Main() in C:\Git\ProtectedSqlTest\ProtectedSqlTest\Program.cs:line 16
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:
HResult=-2146233036
Message=The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception.
Source=System.Data
TypeName=System.Data.SqlClient.SqlConnectionFactory
StackTrace:
at System.Data.SqlClient.SqlConnection..cctor()
InnerException:
HResult=-2146233036
Message=The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception.
Source=System.Data
TypeName=System.Data.SqlClient.SqlPerformanceCounters
StackTrace:
at System.Data.SqlClient.SqlConnectionFactory..cctor()
InnerException:
HResult=-2147024809
Message=The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))
Source=mscorlib
StackTrace:
at System.Globalization.TextInfo.InternalChangeCaseString(IntPtr handle, IntPtr handleOrigin, String localeName, String str, Boolean isToUpper)
at System.Globalization.TextInfo.ToLower(String str)
at System.String.ToLower(CultureInfo culture)
at System.Diagnostics.PerformanceCounterLib.GetPerformanceCounterLib(String machineName, CultureInfo culture)
at System.Diagnostics.PerformanceCounterLib.IsCustomCategory(String machine, String category)
at System.Diagnostics.PerformanceCounter.InitializeImpl()
at System.Diagnostics.PerformanceCounter.set_RawValue(Int64 value)
at System.Data.ProviderBase.DbConnectionPoolCounters.Counter..ctor(String categoryName, String instanceName, String counterName, PerformanceCounterType counterType)
at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp)
at System.Data.SqlClient.SqlPerformanceCounters..ctor()
at System.Data.SqlClient.SqlPerformanceCounters..cctor()
InnerException:
It's enough to simply call CryptUnprotectData for the SqlConnection to fail, the connection itself doesn't need to use the returned SecureString.
I'm using the extension methods from here as described in this post for my minimal repro:
class Program
{
const string ProtectedSecret = /* SNIP - base 64 encoded protected data here */;
static void Main()
{
// calling AppendProtectedData breaks the following SqlConnection
// without the following line the application works fine
new SecureString().AppendProtectedData(Convert.FromBase64String(ProtectedSecret));
using (var conn = new SqlConnection("Server=(localdb)\\MSSqlLocalDb;Trusted_Connection=true"))
using (var cmd = new SqlCommand("select 1", conn))
{
conn.Open();
cmd.ExecuteNonQuery();
}
}
}
If i create a new SqlConnection before I load the password, I can create new SqlConnections fine for the duration of the application as it seems to use the same SqlConnectionFactory, but that means as a workaround I have to do something like this at the start of the application:
new SqlConnection().Dispose();
... which I'd like to avoid.
The following do not help:
Debug vs Release build
Debugging in Visual Studio vs running through the command line
Changing the CryptProtectFlags that is passed to CryptUnprotectData.
Removing RuntimeHelpers.PrepareConstrainedRegions() from the protection method.
Windows 10, VS Enterprise 2015, Console Application (.NET 4.6.1)
UPDATE: Running the data protection code in another threads gives a similar exception with a different root cause:
System.TypeInitializationException was unhandled
HResult=-2146233036
Message=The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception.
Source=System.Data
TypeName=System.Data.SqlClient.SqlConnection
StackTrace:
at System.Data.SqlClient.SqlConnection..ctor()
at System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential)
at System.Data.SqlClient.SqlConnection..ctor(String connectionString)
at ProtectedSqlTest.Program.Main() in C:\Git\ProtectedSqlTest\ProtectedSqlTest\Program.cs:line 17
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:
HResult=-2146233036
Message=The type initializer for 'System.Data.SqlClient.SqlConnectionFactory' threw an exception.
Source=System.Data
TypeName=System.Data.SqlClient.SqlConnectionFactory
StackTrace:
at System.Data.SqlClient.SqlConnection..cctor()
InnerException:
HResult=-2146233036
Message=The type initializer for 'System.Data.SqlClient.SqlPerformanceCounters' threw an exception.
Source=System.Data
TypeName=System.Data.SqlClient.SqlPerformanceCounters
StackTrace:
at System.Data.SqlClient.SqlConnectionFactory..cctor()
InnerException:
BareMessage=Configuration system failed to initialize
HResult=-2146232062
Line=0
Message=Configuration system failed to initialize
Source=System.Configuration
StackTrace:
at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
at System.Configuration.ClientConfigurationSystem.PrepareClientConfigSystem(String sectionName)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Configuration.PrivilegedConfigurationManager.GetSection(String sectionName)
at System.Diagnostics.DiagnosticsConfiguration.Initialize()
at System.Diagnostics.DiagnosticsConfiguration.get_SwitchSettings()
at System.Diagnostics.Switch.InitializeConfigSettings()
at System.Diagnostics.Switch.InitializeWithStatus()
at System.Diagnostics.Switch.get_SwitchSetting()
at System.Data.ProviderBase.DbConnectionPoolCounters..ctor(String categoryName, String categoryHelp)
at System.Data.SqlClient.SqlPerformanceCounters..ctor()
at System.Data.SqlClient.SqlPerformanceCounters..cctor()
InnerException:
HResult=-2147024809
Message=Item has already been added. Key in dictionary: 'MACHINE' Key being added: 'MACHINE'
Source=mscorlib
StackTrace:
at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)
at System.Collections.Hashtable.Add(Object key, Object value)
at System.Configuration.Internal.InternalConfigRoot.GetConfigRecord(String configPath)
at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
InnerException:

Interestingly the faulting code is:
internal static PerformanceCounterLib GetPerformanceCounterLib(string machineName, CultureInfo culture) {
SharedUtils.CheckEnvironment();
string lcidString = culture.LCID.ToString("X3", CultureInfo.InvariantCulture);
if (machineName.CompareTo(".") == 0)
machineName = ComputerName.ToLower(CultureInfo.InvariantCulture);
else
machineName = machineName.ToLower(CultureInfo.InvariantCulture);
...
the line that calls ComputerName.ToLower(CultureInfo.InvariantCulture) causes the exception.
You can reproduce the same behavior just calling code
new SecureString().AppendProtectedData(Convert.FromBase64String(ProtectedSecret));
string lower = "Something".ToLower(CultureInfo.InvariantCulture);
Somehow in the constructor of the TextInfo class
this.m_dataHandle = CompareInfo.InternalInitSortHandle(m_textInfoName, out handleOrigin);
returns invalid data if this is not called before CryptUnprotectData function.
This seems like a bug in the framework. You can submit it to Microsoft. In the meantime you can call this line beforehand to prevent the error.
"".ToLower(CultureInfo.InvariantCulture);

I was recently experiencing similar symptoms, using the same code from http://www.griffinscs.com/?p=12: any call to CryptUnprotectData would lead to an exception in some unrelated code. Interestingly, the failure only occurred on a Windows 10 machine; the same code worked fine on a Windows 7 machine.
I fixed the problem by changing the declarations of the szDataDescr parameters in both CryptProtectData and CryptUnprotectData from string to IntPtr, and passing IntPtr.Zero instead of string.Empty in the two calls.

Getting IllegalFormatName exception in messageQueue.BeginReceive

I am trying to create a eventhandler for a msmq message router and I almost just copied a online example from msdn library
example 2.
But when I invoke messageQueue.BeginReceive() I get a IllegalFormatName exception.
I am using a private queue
Using VS 2015 on windows 10
Solution is using .Net 4.5.2
I got no problems sending messages to any of my private queues or reading from them if I use messageQueue.Receive()
Exception details below:
System.Messaging.MessageQueueException was unhandled
ErrorCode=-2147467259 HResult=-2147467259 Message=Formatnavnet er
ugyldigt. Source=System.Messaging StackTrace:
ved System.Messaging.MessageQueue.MQCacheableInfo.get_ReadHandle()
ved System.Messaging.MessageQueue.ReceiveAsync(TimeSpan timeout, CursorHandle cursorHandle, Int32 action, AsyncCallback
callback, Object stateObject)
ved System.Messaging.MessageQueue.BeginReceive()
ved MYFirstMSMQ.Program.Main(String[] args) in ......Visual Studio 2015\Projects\FirstQueue_bluff_city\ConsoleApplication1\Program.cs:linje
68
ved System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
ved System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
ved Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
ved System.Threading.ThreadHelper.ThreadStart_Context(Object state)
ved System.Threading.ExecutionContext.RunInternal(ExecutionContext
executionContext, ContextCallback callback, Object state, Boolean
preserveSyncCtx)
ved System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean
preserveSyncCtx)
ved System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
ved System.Threading.ThreadHelper.ThreadStart() InnerException:
Sorry about the Message - windows returns some messages in my native language

C# SignalR within a class library

I've been developing a Web Service (C# WebAPI2) so can simply send messages using SignalR and then store the message transcript within a TSQL database. However, after moving the SignalR hubs within a class library I can't seem to access them now. I have developed a very simply console application to communicate with the Web Service but I am getting a strange exception being thrown.
Here is the exception which is being thrown:
"StatusCode: 500, ReasonPhrase: 'Internal Server Error', Version: 1.1,
Content: System.Net.Http.StreamContent, Headers:\r\n{\r\n
Transfer-Encoding: chunked\r\n X-SourceFiles:
=?UTF-8?B?QzpcRGV2ZWxvcG1lbnRcU291cmNlQ29kZVxTVVBTZXJ2aWNlXFNVUC5TZXJ2aWNlXHNpZ25hbHJcbmVnb3RpYXRl?=\r\n
Cache-Control: private\r\n Date: Wed, 11 Mar 2015 10:50:18 GMT\r\n
Server: Microsoft-IIS/8.0\r\n X-AspNet-Version: 4.0.30319\r\n
X-Powered-By: ASP.NET\r\n Content-Type: text/html;
charset=utf-8\r\n}"
An unhandled exception of type 'System.AggregateException' occurred
in SignalR Client Connection.exe
The Owin Startup file is placed within the Web Service App_Start folder, here is what it looks like:
using System;
using System.Threading.Tasks;
using Microsoft.Owin;
using Owin;
using Microsoft.AspNet.SignalR;
[assembly: OwinStartup(typeof(Service.App_Start.Startup))]
namespace Service.App_Start
{
public class Startup
{
public void Configuration(IAppBuilder app)
{
app.Map("/signalr", map =>
{
var hubConfiguration = new HubConfiguration
{
EnableDetailedErrors = true,
EnableJSONP = true
};
map.RunSignalR(hubConfiguration);
});
}
}
}
Many thanks.

I am not sure the details in your case, but for me I found that I was receiving the System.AggregationException:
System.AggregateException was unhandled
HResult=-2146233088
Message=One or more errors occurred.
Source=mscorlib
StackTrace:
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
at System.Threading.Tasks.Task.Wait()
at Client.CommunicationHandler.AddMessage(String method, String args, String serverUri, String hubName) in c:\Workspace\EnvisionRealTimeRemoteOps\CodeProjectSelfHostedBroadcastServiceSignalRSample\Client\CommunicationHandler.cs:line 24
at Client.Program.Main(String[] args) in c:\Workspace\EnvisionRealTimeRemoteOps\CodeProjectSelfHostedBroadcastServiceSignalRSample\Client\Program.cs:line 15
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.Net.Http.HttpRequestException
HResult=-2146233088
Message=An error occurred while sending the request.
InnerException: System.Net.WebException
HResult=-2146233079
Message=Unable to connect to the remote server
Source=System
StackTrace:
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
InnerException: System.Net.Sockets.SocketException
HResult=-2147467259
Message=No connection could be made because the target machine actively refused it 127.0.0.1:8083
Source=System
ErrorCode=10061
NativeErrorCode=10061
StackTrace:
at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
InnerException:
Until I added a call to the following:
WebApp.Start("http://localhost:8083"); // Put your desired URL in...
Please note that in my case my application is using Self-Hosted SignalR.

Getting ProtocolException with running DotNetOpenAuth sample

I have downloaded DotNetOpenAuth-3.4.6.10357 built it (had to exclude OpenIdOfflineProvider because of build errors) and run OAuthConsumerWpf. After clicking Authorize I got the exception below. Please bear in mind I modified app.config as instructed. This is from the Google tab. I also tried Generic tab with the same results.
What could be wrong here? Shouldn't things as simple as this work out of the box?
DotNetOpenAuth.Messaging.ProtocolException was unhandled
Message=Error occurred while sending a direct message or getting the response.
Source=DotNetOpenAuth
StackTrace:
at DotNetOpenAuth.Messaging.StandardWebRequestHandler.GetResponse(HttpWebRequest request, DirectWebRequestOptions options) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\Messaging\StandardWebRequestHandler.cs:line 172
at DotNetOpenAuth.Messaging.StandardWebRequestHandler.GetResponse(HttpWebRequest request) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\Messaging\StandardWebRequestHandler.cs:line 100
at DotNetOpenAuth.Messaging.Channel.GetDirectResponse(HttpWebRequest webRequest) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\Messaging\Channel.cs:line 607
at DotNetOpenAuth.Messaging.Channel.RequestCore(IDirectedProtocolMessage request) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\Messaging\Channel.cs:line 628
at DotNetOpenAuth.Messaging.Channel.Request(IDirectedProtocolMessage requestMessage) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\Messaging\Channel.cs:line 451
at DotNetOpenAuth.Messaging.Channel.Request[TResponse](IDirectedProtocolMessage requestMessage) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\Messaging\Channel.cs:line 431
at DotNetOpenAuth.OAuth.ConsumerBase.PrepareRequestUserAuthorization(Uri callback, IDictionary`2 requestParameters, IDictionary`2 redirectParameters, String& requestToken) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\OAuth\ConsumerBase.cs:line 222
at DotNetOpenAuth.OAuth.DesktopConsumer.RequestUserAuthorization(IDictionary`2 requestParameters, IDictionary`2 redirectParameters, String& requestToken) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\OAuth\DesktopConsumer.cs:line 42
at DotNetOpenAuth.ApplicationBlock.GoogleConsumer.RequestAuthorization(DesktopConsumer consumer, Applications requestedAccessScope, String& requestToken) in C:\Users\user\Desktop\DotNetOpenAuth-3.4.6.10357\Samples\DotNetOpenAuth.ApplicationBlock\GoogleConsumer.cs:line 204
at DotNetOpenAuth.Samples.OAuthConsumerWpf.MainWindow.<beginAuthorizationButton_Click>b__3(DesktopConsumer consumer, String& requestToken) in C:\Users\user\Desktop\DotNetOpenAuth-3.4.6.10357\Samples\OAuthConsumerWpf\MainWindow.xaml.cs:line 92
at DotNetOpenAuth.Samples.OAuthConsumerWpf.Authorize.<>c__DisplayClass4.<.ctor>b__0(Object state) in C:\Users\user\Desktop\DotNetOpenAuth-3.4.6.10357\Samples\OAuthConsumerWpf\Authorize.xaml.cs:line 33
at System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)
InnerException: System.Net.WebException
Message=The remote server returned an error: (400) Bad Request.
Source=System
StackTrace:
at System.Net.HttpWebRequest.GetResponse()
at DotNetOpenAuth.Messaging.StandardWebRequestHandler.GetResponse(HttpWebRequest request, DirectWebRequestOptions options) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\Messaging\StandardWebRequestHandler.cs:line 126
InnerException:

Works for me. Perhaps your computer is behind a firewall or needs a proxy server registered?