Develop Reference

How to enable TLS 1.2 for outbound request from windows server 2012 R2?

I need to enable outbound request from windows server 2012 R2 from .net application (build in 4.0 version).
I've followed everything as stated in this link
But still I'm receiving the following error:
System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> System.ComponentModel.Win32Exception: The client and server cannot communicate, because they do not possess a common algorithm at System.Net.SSPIWrapper.AcquireCredentialsHandle(SSPIInterface SecModule, String package, CredentialUse intent, SecureCredential scc) at System.Net.Security.SecureChannel.AcquireCredentialsHandle(CredentialUse credUsage, SecureCredential& secureCredential) at System.Net.Security.SecureChannel.AcquireClientCredentials(Byte[]& thumbPrint) at System.Net.Security.SecureChannel.GenerateToken(Byte[] input, Int32 offset, Int32 count, Byte[]& output) at System.Net.Security.SecureChannel.NextMessage(Byte[] incoming, Int32 offset, Int32 count) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Net.TlsStream.CallProcessAuthentication(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.TlsStream.ProcessAuthentication(LazyAsyncResult result) at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.ConnectStream.WriteHeaders(Boolean async) --- End of inner exception stack trace --- at System.Net.HttpWebRequest.GetResponse()
I'm facing this error because we are using checkout payment gateway and they stopped taking any request below TLS 1.2 after that we are facing this issue.
Here is part of my registry key sample:
Please suggest me on how may I solve this issue. Thanks in advance.

You should explicitly choose TLS 1.2 in code. Add the following row on the start of your application:
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

TLS is Security Layer That You can enable it in iis with import an certificate in the server certificates. certificate file is a file with .pfx extension that you can create it with a lot of way

An unhandled exception was generated during the execution of the current web request.[HttpAntiForgeryException]

I have a C# .NET MVC app and I am getting "anti-forgery token could not be decrypted". I don't know where the error is and I need help resolving this issue. And I am running this application on my localhost. Below is the error I am getting.
Server Error in '/' Application.
The anti-forgery token could not be decrypted. If this application is hosted by a Web Farm or cluster, ensure that all machines are running the same version of ASP.NET Web Pages and that the <machineKey> configuration specifies explicit encryption and validation keys. AutoGenerate cannot be used in a cluster.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.Mvc.HttpAntiForgeryException: The anti-forgery token could not be decrypted. If this application is hosted by a Web Farm or cluster, ensure that all machines are running the same version of ASP.NET Web Pages and that the <machineKey> configuration specifies explicit encryption and validation keys. AutoGenerate cannot be used in a cluster.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[HttpAntiForgeryException (0x80004005): The anti-forgery token could not be decrypted. If this application is hosted by a Web Farm or cluster, ensure that all machines are running the same version of ASP.NET Web Pages and that the <machineKey> configuration specifies explicit encryption and validation keys. AutoGenerate cannot be used in a cluster.]
System.Web.Helpers.AntiXsrf.AntiForgeryTokenSerializer.Deserialize(String serializedToken) +337
System.Web.Helpers.AntiXsrf.AntiForgeryTokenStore.GetFormToken(HttpContextBase httpContext) +91
System.Web.Helpers.AntiXsrf.AntiForgeryWorker.Validate(HttpContextBase httpContext) +44
System.Web.Helpers.AntiForgery.Validate() +92
System.Web.Mvc.ValidateAntiForgeryTokenAttribute.OnAuthorization(AuthorizationContext filterContext) +18
System.Web.Mvc.ControllerActionInvoker.InvokeAuthorizationFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor) +97
System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__19(AsyncCallback asyncCallback, Object asyncState) +743
System.Web.Mvc.Async.WrappedAsyncResult`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +14
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +128
System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction(ControllerContext controllerContext, String actionName, AsyncCallback callback, Object state) +343
System.Web.Mvc.Controller.<BeginExecuteCore>b__1c(AsyncCallback asyncCallback, Object asyncState, ExecuteCoreState innerState) +25
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +30
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +128
System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +465
System.Web.Mvc.Controller.<BeginExecute>b__14(AsyncCallback asyncCallback, Object callbackState, Controller controller) +18
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +20
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +128
System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +374
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +16
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__4(AsyncCallback asyncCallback, Object asyncState, ProcessRequestState innerState) +52
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +30
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +128
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +384
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +48
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +103
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

When ASP.NET generates the token, it uses some machine key for that. If you later try to decrypt that token with another key, you will get this type of exception.
It is very strange that you can get this by just running localhost, since this usually happens on a load balanced scenario e.g. when you have not set up the machine key to be the same.
Another possible reason is that you manipulate the token on the frontend somehow or get the web page from another machine, though both scenarios seem to be unlikely.
Anyway, if you have troubles with the load balancing or something like this, you need to set up the same machine key in all web.config files.

Power BI Unable to Apply Query Update

New to Power BI, but downloaded Power BI Desktop. I connected it to my Postgres Database and all was looking good. I am pulling data and able to start building relationships & reports.
I saw this curious bar appear though:
I clicked it and it looked like it was connecting to the DB and pulling data again from all my tables. A the end I see an error notice with this warning:
Failed to save modifications to the Server. Error returned: 'The base version must not be negative when impact is requested for a transaction.'.
It let's me "Copy Details" and I see the full stack trace:
Error Message:
Failed to save modifications to the Server. Error returned: 'The base version must not be negative when impact is requested for a transaction.
'.
Stack Trace:
Microsoft.AnalysisServices.OperationException: Failed to save modifications to the Server. Error returned: 'The base version must not be negative when impact is requested for a transaction.
'.
Server stack trace:
at Microsoft.AnalysisServices.Tabular.Model.SaveChanges(SaveOptions saveOptions)
at Microsoft.PowerBI.Client.Windows.AnalysisServices.Relationships.RelationshipDetectionFast.Detect(HashSet`1 newTableColumnPairs, CancellationToken cancellationToken, RelationshipDetectionProgress progress)
at Microsoft.PowerBI.Client.Windows.AnalysisServices.Relationships.RelationshipManager.AutodetectRelationships(RelationshipDetectionTypes detectionTypes, HashSet`1 newTableColumnPairs, RelationshipDetectionProgress progress)
at Microsoft.PowerBI.Client.Windows.Modeling.RelationshipLoader.<>c__DisplayClassf.<>c__DisplayClass11.<AutodetectRelationships>b__e()
at Microsoft.PowerBI.Client.Windows.AnalysisServices.Relationships.RelationshipManagerHelper.ExecuteAndCommitChanges(IRelationshipManager manager, Action action)
at Microsoft.PowerBI.Client.Telemetry.PowerBITelemetryService.LogTimedAction(TelemetryUserActionId userActionId, Action`1 action)
at Microsoft.PowerBI.Client.Windows.Modeling.RelationshipLoader.DetectAndImportRelationships(SynchronizationContext uiThreadContext, IAnalysisServicesLoadToken loadToken, IEnumerable`1 loadInputs, IAnalysisServicesLoadContext loadContext, Report report, IExtendedModelChangeScope modelChangeScope, List`1 newTableColumnPairs, Action relationshipAutodetectStartCallback)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.CreateRelationships(IAnalysisServicesLoadContext loadContext, IExtendedModelChangeScope modelChangeScope, List`1 newTableColumnPairs, Action relationshipAutodetectStartCallback)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.ProcessLoadInputs(IExtendedModelChangeScope modelChangeScope, Action relationshipAutodetectStartCallback)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.<>c__DisplayClass7.<PerformLoadInternal>b__5(IExtendedModelChangeScope modelChangeScope)
at Microsoft.PowerBI.Client.Windows.Modeling.AsyncModelAuthoringService.<>c__DisplayClass9.<RunExtendedModelChangeAsync>b__7(Task`1 t)
at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2.InnerInvoke()
at System.Threading.Tasks.Task.Execute()
Exception rethrown at [0]:
at Microsoft.PowerBI.Client.Windows.Utilities.TaskExtensions.WaitAndUnpackException(Task task)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.PerformLoadInternal(Action relationshipAutodetectStartCallback)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.PerformLoad(Action relationshipAutodetectStartCallback)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.<>c__DisplayClass1.<LoadTablesAsync>b__0(Object state)
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
Invocation Stack Trace:
at Microsoft.Mashup.Host.Document.ExceptionExtensions.GetCurrentInvocationStackTrace()
at Microsoft.Mashup.Client.ClientShared.StackTraceInfo..ctor(String exceptionStackTrace, String invocationStackTrace)
at Microsoft.Mashup.Client.ClientShared.UnexpectedExceptionHandler.<>c__DisplayClass1.<HandleException>b__0()
at Microsoft.Mashup.Host.Document.SynchronizationContextExtensions.<>c__DisplayClass3.<SendAndMarshalExceptions>b__0(Object null)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
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.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
at Microsoft.Mashup.Client.ClientShared.WindowManager.ShowDialog[T](T form, IWin32Window owner)
at Microsoft.Mashup.Client.ClientShared.Ux.FloatingDialog.FloatingDialog.ShowDialog(IWin32Window owner, Nullable`1 showTimeout)
at Microsoft.PowerBI.Client.Windows.FloatingDialog.KoLoadToReportDialog.StartEvaluationAndShowDialog(IEnumerable`1 queriesToLoad, Nullable`1 showTimeout, Boolean requireFullDataRefresh)
at Microsoft.PowerBI.Client.Windows.FloatingDialog.KoLoadToReportDialog.TryShowDialogForQueries(Report report, IWin32Window ownerWindow, WindowsHost windowsHost, IEnumerable`1 queriesToLoad, LocalizedString title, Boolean requireFullDataRefresh)
at Microsoft.PowerBI.Client.Windows.HtmlControls.ReportView.ReportCanvasProxyHtmlControlAsync.<LoadQueriesToReportFromInfoBar>b__6()
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
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.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
at Microsoft.Mashup.Client.ClientShared.WindowManager.ShowDialog[T](T form, IWin32Window owner)
at Microsoft.PowerBI.Client.Program.<>c__DisplayClassb.<Main>b__0()
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
at Microsoft.PowerBI.Client.Program.Main(String[] args)
ModelChangeStartingStackTrace
at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
at System.Environment.get_StackTrace()
at Microsoft.PowerBI.Client.Windows.Modeling.AsyncModelAuthoringService.RunExtendedModelChangeAsync(Action`1 extendedModelChange, CancellationToken cancellationToken, Boolean blockUI)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.PerformLoadInternal(Action relationshipAutodetectStartCallback)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.PerformLoad(Action relationshipAutodetectStartCallback)
at Microsoft.PowerBI.Client.Windows.Modeling.PowerQueryToModelLoader.<>c__DisplayClass1.<LoadTablesAsync>b__0(Object state)
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
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.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
What does the error message mean? I don't know what data failed to be written out.
Also, what Server did it try to write to? Did it fail to write to a local internal database of Power BI or did it try to write out to my remote connected postgres database?

Older post I know, but I just got this error message and was able to get around it.
Searching around, I found this post from a user named jagatho that says
It has to do with the auto detection of relationships.
If I remove the column that would make sense that Power BI would predict having a relationship between tables and added a new one with the same name with null values in two PowerQuery steps, then I can load the data.After the initial load I can remove the two steps and everything works, because it only tries to detect relationships on the initial load.
While I wasn't able to find the column(s) causing the trouble, in Power BI Desktop (Version: 2.64.5285.661 64-bit (November 2018)), File | Options and settings | Options | CURRENT FILE | Data Load, unchecking "Autodetect new relationships after data is loaded" solved the problem for me.

Try catch async await https exception

I have what seems a really weird situation. I have some async/await code which uses RestSharp to get some data off several rest APIs (same API hosted on different URLs) which a kind of directory service returns.
Now the problem: one of the APIs returned by said directory service is somehow "private" and initiating a SSL connection to it fails. Fiddler captures the following response:
HTTP/1.1 200 Connection Established
FiddlerGateway: Direct
StartTime: 19:13:11.117
Connection: close
fiddler.network.https> HTTPS handshake to foo.bar.com failed. System.IO.IOException The handshake failed due to an unexpected packet format.
I would ideally like to skip getting data from this API in case this happens and just move on. However, it turns out that a try/catch doesn't help! A NullReferenceException is thrown but even a generic try/catch doesn't manage to catch it.
The code is pretty straightforward:
try
{
await GetDataAsync(url);
}
catch
{
// never gets called
}
and
private async Task<List<Data>> GetDataAsync(string url)
{
var request = new RestRequest("/foo");
var restClient = new RestClient(url);
var response = await restClient.ExecuteTaskAsync<List<Data>>(request); // <-- this throws
return response.Data;
}
I've extracted the code in a library and tried it both in a Console app and in a WPF app, same result, catch block never gets entered.
Any ideas?
l.e.: as requested, here's the full exception stack trace
Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object.
at RestSharp.RestClient.<>c__DisplayClass15`1.<ExecuteTaskAsync>b__12(IRestResponse`1 response, RestRequestAsyncHandle _)
at RestSharp.RestClient.DeserializeResponse[T](IRestRequest request, Action`2 callback, IRestResponse response, RestRequestAsyncHandle asyncHandle)
at RestSharp.RestClient.<>c__DisplayClassa`1.<ExecuteAsync>b__9(IRestResponse response, RestRequestAsyncHandle asyncHandle)
at RestSharp.RestClient.ProcessResponse(IRestRequest request, HttpResponse httpResponse, RestRequestAsyncHandle asyncHandle, Action`2 callback)
at RestSharp.RestClient.<>c__DisplayClass3.<ExecuteAsync>b__0(HttpResponse r)
at RestSharp.Http.ExecuteCallback(HttpResponse response, Action`1 callback)
at RestSharp.Http.ResponseCallback(IAsyncResult result, Action`1 callback)
at RestSharp.Http.<>c__DisplayClass3.<GetStyleMethodInternalAsync>b__1(IAsyncResult result)
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.HttpWebRequest.SetResponse(Exception E)
at System.Net.HttpWebRequest.CheckWriteSideResponseProcessing()
at System.Net.ConnectStream.ProcessWriteCallDone(ConnectionReturnResult returnResult)
at System.Net.HttpWebRequest.WriteCallDone(ConnectStream stream, ConnectionReturnResult returnResult)
at System.Net.ConnectStream.CallDone(ConnectionReturnResult returnResult)
at System.Net.ConnectStream.IOError(Exception exception, Boolean willThrow)
at System.Net.ConnectStream.HandleWriteHeadersException(Exception e, WebExceptionStatus error)
at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)
at System.Net.LazyAsyncResult.Complete(IntPtr userToken)
at System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)
at System.Net.TlsStream.ResumeIOWorker(Object result)
at System.Net.TlsStream.WakeupPendingIO(IAsyncResult ar)
at System.Net.LazyAsyncResult.Complete(IntPtr userToken)
at System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)
at System.Net.Security.SslState.FinishHandshake(Exception e, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.PartialFrameCallback(AsyncProtocolRequest asyncRequest)
at System.Net.AsyncProtocolRequest.CompleteRequest(Int32 result)
at System.Net.FixedSizeReader.CheckCompletionBeforeNextRead(Int32 bytes)
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(UInt32errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)

This seems to be a bug in RestSharp. I'm not sure you can do anything about it without modifying RestSharp's source.

Avoid recursive event in c#

Hi I 've a little question,
I'm using socket and I find many situation of infinite recursion see source: http://pastebin.com/Cbd2Z2uE
the problem is this:
private static void ReceiveCallback(IAsyncResult ar)
{
....
// receive again
socket.BeginReceive(state.Buffer,
0,
StateObject.BufferSize,
0,
ReceiveCallback,
state);
....
}
So we have an async function that is called again in a recursive way. Here We have a problem with the stack?
To be more clear, this situation is ok and recursion is fine, the problem and question is:
in this case can I have a problem of stackoverflow?
thanks

You are not recursing (or in danger or recursing). You are simply scheduling a callback to be executed when an IO competion port receives data for you to process (checked source code to see this). This will not happen while your function is running on the current thread because the very same thread has to check for message on IO port via polling or another worker thread will run your function all together. In either case you are not recursing or in danger of recusing so the stack will not blow up (socket.BeginReceive should return immediatly & will not call your function in it).
I believe you are looking at scenario 14 shown on this page but it may be the previous scenario since your console app has a message pump. But the bottom line is that there is no actual functions recursing in your application (or supporitng OS framework functionality used by it).

Your ReceiveCallback is called by framework code unless you call it directly.
BeginReceive stores specified delegate as callback function, and it doesn't calls the delegate at that time.
For example, I added some codes to get stack trace:
private static void ReceiveCallback(IAsyncResult ar)
{
Console.WriteLine(Environment.StackTrace);
// retrieve the state and socket
and gets:
at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
at System.Environment.get_StackTrace()
at Program.ReceiveCallback(IAsyncResult ar) in r:\Temp\LINQPad\aqwfvqfb\query_ettlka.cs:line 102
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)
And It's shown even you call BeginReceive in ReceiveCallback.