Something wrong with the Iothub demo

when i run the iothub demo from the azure website ,it always occures the exceptio,just like that:

Exception:

Microsoft.ServiceBus.Messaging.MessagingCommunicationException was unhandled HResult=-2146233088 IsTransient=true Message=An invalid pointer address system detects attempts to use a pointer argument in a call when。

Source=Microsoft.ServiceBus StackTrace:  Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)

 Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.RunSynchronously()  icrosoft.ServiceBus.Messaging.Amqp.AmqpEventHubClient.GetRuntimeInformation()

ReadFromDevice04.Program.Main(String[] args) 位置 F:\学习课件\C#学习资料\AZURE练习程序\AzureCloudService1\ReadFromDevice04\ReadFromDevice04\Program.cs:行号 21 在 System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) 在 System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) 在 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 在 System.Threading.ThreadHelper.ThreadStart_Context(Object state) 在 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 在 System.Threading.ThreadHelper.ThreadStart() InnerException: ErrorCode=10014 HResult=-2147467259 Message=系统检测到在一个调用中尝试使用指针参数时的无效指针地址。 NativeErrorCode=10014 Source=Microsoft.ServiceBus StackTrace: Server stack trace: 在 System.Net.Sockets.Socket.get_RemoteEndPoint() 在 Microsoft.ServiceBus.Messaging.Amqp.Transport.TcpTransport..ctor(Socket socket, TcpTransportSettings transportSettings) 在 Microsoft.ServiceBus.Messaging.Amqp.Transport.TcpTransportInitiator.Complete(SocketAsyncEventArgs e, Boolean completeSynchronously) Exception rethrown at [0]: 在 Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result) 在 Microsoft.ServiceBus.Messaging.Amqp.AmqpMessagingFactory.ConnectAsyncResult.<getasyncsteps>b__9e(ConnectAsyncResult thisPtr, IAsyncResult r) 在 Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result) Exception rethrown at [1]: 在 Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result) 在 Microsoft.ServiceBus.Messaging.Amqp.AmqpMessagingFactory.EndCreateConnection(IAsyncResult result) 在 Microsoft.ServiceBus.Messaging.Amqp.FaultTolerantObject`1.CreateAsyncResult.<getasyncsteps>b__4(CreateAsyncResult thisPtr, IAsyncResult r) 在 Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result) Exception rethrown at [2]: 在 Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result) 在 Microsoft.ServiceBus.Common.AsyncResult`1.End(IAsyncResult asyncResult) 在 Microsoft.ServiceBus.Messaging.Amqp.FaultTolerantObject`1.OnEndCreateInstance(IAsyncResult asyncResult) 在 Microsoft.ServiceBus.Messaging.SingletonManager`1.EndGetInstance(IAsyncResult asyncResult) 在 Microsoft.ServiceBus.Messaging.Amqp.AmqpMessagingFactory.CreateManagementLinkAsyncResult.<>c__DisplayClass17a.<getasyncsteps>b__175(CreateManagementLinkAsyncResult thisPtr, IAsyncResult r) 在 Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result) Exception rethrown at [3]: 在 Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result) 在 Microsoft.ServiceBus.Messaging.Amqp.AmqpEventHubClient.GetRuntimeInfoAsyncResult.<getasyncsteps>b__14(GetRuntimeInfoAsyncResult thisPtr, IAsyncResult r) 在 Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result) InnerException: </getasyncsteps></getasyncsteps></getasyncsteps></getasyncsteps>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.ServiceBus.Messaging;
using System.Threading;

namespace ReadFromDevice04
{
    class Program
    {
        static string connectionString = "xxxx";
        static string iotHubD2cEndpoint = "messages/events";
        static EventHubClient eventHubClient;
        static void Main(string[] args)
        {
            Console.WriteLine("Receive messages. Ctrl-C to exit.\n");
            eventHubClient = EventHubClient.CreateFromConnectionString(connectionString, iotHubD2cEndpoint);

            var d2cPartitions = eventHubClient.GetRuntimeInformation().PartitionIds;  //////this place occured exception

            CancellationTokenSource cts = new CancellationTokenSource();

            System.Console.CancelKeyPress += (s, e) =>
            {
                e.Cancel = true;
                cts.Cancel();
                Console.WriteLine("Exiting...");
            };

            var tasks = new List<Task>();
            foreach (string partition in d2cPartitions)
            {
                tasks.Add(ReceiveMessagesFromDeviceAsync(partition, cts.Token));
            }
            Task.WaitAll(tasks.ToArray());
        }
        private static async Task ReceiveMessagesFromDeviceAsync(string partition, CancellationToken ct)
        {
            var eventHubReceiver = eventHubClient.GetDefaultConsumerGroup().CreateReceiver(partition, DateTime.UtcNow);
            while (true)
            {
                if (ct.IsCancellationRequested) break;
                EventData eventData = await eventHubReceiver.ReceiveAsync();
                if (eventData == null) continue;

                string data = Encoding.UTF8.GetString(eventData.GetBytes());
                Console.WriteLine("Message received. Partition: {0} Data: '{1}'", partition, data);
            }
        }
    }
}