CRM 2011 Dicovery服务故障异常

我在一次会议上问了同样的问题，但没有得到答案。因此，我将再次尝试stackoverflow

我正在运行crm 2011培训工具包中的示例代码

 var creds = new ClientCredentials();
 var dsp = new DiscoveryServiceProxy( dinfo, creds);
 dsp.Authenticate();
 var orgRequest = new RetrieveOrganizationRequest();
 var response = dsp.Execute(orgRequest);
 var orgResponse = response as RetrieveOrganizationsResponse;
 if (orgResponse != null)
 comboOrgs.ItemsSource = orgResponse.Details;

在var response=dsp.Execute（orgRequest）行中，我得到了FaltException`1，详细消息如下

System.ServiceModel.FaultException`1 was unhandled
 Message=organizationName
 Source=mscorlib
 Action=http://schemas.microsoft.com/xrm/2011/Contracts/Discovery/IDiscoveryService/ExecuteDiscoveryServiceFaultFault
 StackTrace:
 Server stack trace: 
 at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
 at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
 at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
 at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
 Exception rethrown at [0]: 
 at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
 at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
 at Microsoft.Xrm.Sdk.Discovery.IDiscoveryService.Execute(DiscoveryRequest request)
 at Microsoft.Xrm.Sdk.Client.DiscoveryServiceProxy.Execute(DiscoveryRequest request)

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我可以使用浏览器访问Discovery.svc文件。所以服务器url应该是正确的。这是身份验证问题吗？

这是针对Microsoft CRM Online还是内部部署的？对于在线，我知道您希望使用SDK中的一些东西-

// Connect to the Discovery service. 
// The using statement assures that the service proxy will be properly disposed.
using (DiscoveryServiceProxy _serviceProxy = new DiscoveryServiceProxy(serverConfig.DiscoveryUri,
                                                    serverConfig.HomeRealmUri,
                                                    serverConfig.Credentials,
                                                    serverConfig.DeviceCredentials))
{
    // You can choose to use the interface instead of the proxy.
    IDiscoveryService service = _serviceProxy;

    #region RetrieveOrganizations Message

    // Retrieve details about all organizations discoverable via the
    // Discovery service.
    RetrieveOrganizationsRequest orgsRequest =
        new RetrieveOrganizationsRequest()
        {
            AccessType = EndpointAccessType.Default,
            Release = OrganizationRelease.Current
        };
    RetrieveOrganizationsResponse organizations =
        (RetrieveOrganizationsResponse)service.Execute(orgsRequest);
}

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DiscoveryServiceProxy类有重载，但如果您提供更多关于您尝试连接到的内容的详细信息，我认为这将缩小它的范围。

这是一个内部部署。我在SDK中尝试了这段代码，效果很好。我现在正在使用SDK示例代码，并试图找到导致错误的确切位置。请求的AccessType和Release参数是我的问题。谢谢