NHibernate - SafeHandle不能为空

Question

我使用NHibernate连接到Oracle数据库。一切都很好，直到我突然开始收到奇怪的Value cannot be null. Parameter name: SafeHandle cannot be null.错误。我不知道我为了得到这个错误而改变了什么，我也不知道它到底意味着什么。谷歌也没有给出结果。下面是完整的堆栈跟踪。有什么想法吗？

当调用BuildSessionFactory时发生错误：

 var x = Fluently.Configure()
        .Database(OracleClientConfiguration.Oracle10
            .ConnectionString(connectionString))
        .Mappings(m => m.FluentMappings.AddFromAssembly(Assembly.GetExecutingAssembly()))
        .BuildConfiguration();

    return x.BuildSessionFactory();

在System.StubHelpers.StubHelpers.SafeHandleAddRef(SafeHandle System.Data.Common.UnsafeNativeMethods.OCIAttrSet(OciHandle trgthndlp，HTYPE trgthndlp，HTYPE trghndltyp，System.Data.OracleClient.OracleInternalConnection.OpenOnLocalTransaction(String trgthndlp，UInt32 size，attrtype，OciHandle errhp)的System.Data.OracleClient.TracedNativeMethods.OCIAttrSet(OciHandle trgthndlp，Byte[]属性，UInt32大小，ATTR吸引类型，OciHandle errhp)在System.Data.OracleClient.OciHandle.SetAttribute(ATTR属性，String值，OciErrorHandle errorHandle)在System.Data.OracleClient.OracleInternalConnection.OpenOnLocalTransaction(String userName，字符串密码，( System.Data.OracleClient.OracleInternalConnection..ctor(OracleConnectionString connectionOptions上的字符串serverName、布尔integratedSecurity、布尔unicode、布尔omitOracleConnectionName) )在System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection、DbConnectionPool池上的对象poolGroupProviderInfo、DbConnectionPool池、DbConnection owningObject)。在System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject，在System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject，在System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)，在System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)，在System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection，System.Data.OracleClient.OracleConnection.Open() at NHibernate.Connection.DriverConnectionProvider.GetConnection() at NHibernate.Tool.hbm2ddl.SuppliedConnectionProviderConnectionHelper.Prepare() at NHibernate.Tool.hbm2ddl.SchemaMetadataUpdater.GetReservedWords(Dialect方言，IConnectionHelper connectionHelper( NHibernate.Tool.hbm2ddl.SchemaMetadataUpdater.Update(ISessionFactory sessionFactory)在NHibernate.Impl.SessionFactoryImpl..ctor(Configuration cfg，IMapping映射，设置设置，( NHibernate.Cfg.Configuration.BuildSessionFactory() at Models.SessionFactory.CreateOracleConnection(String connectionString)，c:\Users\CMENGU\Projects\TNT\Models\SessionManager.cs:line 21 at TNT.SessionManager.InitOracleFactory() in c:\Users\CMENGU\Projects\TNT\TNT\SessionManager.cs:line 29 at TNT.Program.Main() in c:\Users\CMENGU\Projects\TNT\TNT\Program.cs:line 30 at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly，在Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()的System.AppDomain.ExecuteAssembly(String assemblyFile，Evidence，String[] args) 在System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext，ContextCallback回调，对象状态，布尔preserveSyncCtx)在System.Threading.ExecutionContext.Run(ExecutionContext executionContext，ContextCallback回调，对象状态，布尔preserveSyncCtx)在System.Threading.ExecutionContext.Run(ExecutionContext executionContext，ContextCallback回调，Object状态)在System.Threading.ThreadHelper.ThreadStart()

Answer 1

原来，是VisualStudio2015预览版在某种程度上搞砸了与甲骨文库相关的东西，从而导致了这个错误。我不得不重新格式化我的电脑几次，直到我明白了发生了什么。