联邦快递C#样本代码跟踪服务无效操作未处理

我“下载了所有”联邦快递C#示例代码，并加载了Track Service>Track sln文件。我在做这件事时收到了一些警告，但还是向前走了。然后我运行代码，并立即得到以下错误。请告知解决办法

以下是堆栈跟踪：

System.InvalidOperationException was unhandled
  Message=Unable to generate a temporary class (result=1).
error CS0029: Cannot implicitly convert type 'TrackWebServiceClient.TrackServiceWebReference.EMailNotificationEventType' to 'TrackWebServiceClient.TrackServiceWebReference.EMailNotificationEventType[]'

  Source=System.Xml
  StackTrace:
       at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, XmlSerializerCompilerParameters xmlParameters, Evidence evidence)
       at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters, Assembly assembly, Hashtable assemblies)
       at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, String location, Evidence evidence)
       at System.Xml.Serialization.XmlSerializer.GetSerializersFromCache(XmlMapping[] mappings, Type type)
       at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] mappings, Type type)
       at System.Web.Services.Protocols.SoapClientType..ctor(Type type)
       at System.Web.Services.Protocols.SoapHttpClientProtocol..ctor()
       at TrackWebServiceClient.TrackServiceWebReference.TrackService..ctor() in C:\FedEx\TrackService_v10_cs\cs\TrackWebServiceClient\Track\Web References\TrackServiceWebReference\Reference.cs:line 43
       at TrackWebServiceClient.Program.Main(String[] args) in C:\FedEx\TrackService_v10_cs\cs\TrackWebServiceClient\Track\Program.cs:line 16
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

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你的评论说它是用VS2005构建的。你从哪里得到密码的？VS2005与VS2008及更新版本不兼容。网络库不兼容。我直接从联邦快递开发者资源下载。