System.Exception类及其派生类拥有多个属性，其中最重要的属性是Message和Source。Message属性包含当前异常原因的错误信息，Source属性表示导致错误的应用程序或对象的名称。TargetSite属性表示引发当前异常的方法。

Autodesk.AutoCAD.Runtime.Exception 类除了System.Exception类的属性外，另外还提供了ErrorStatus属性，用来表示与当前异常关联的错误状态代码，它属于Autodesk.AutoCAD.Runtime.ErrorStatus枚举。

 Autodesk.AutoCAD.Runtime.ErrorStatus枚举的内容如下：

   AlreadyActive = 0x4e53, 

   AlreadyInactive = 0x4e54, 

   AlreadyInDB = 0x1a, 

   AlreadyInGroup = 260, 

   AmbiguousInput = 4, 

   AmbiguousOutput = 5, 

   AnonymousEntry = 0x26, 

   AtMaxReaders = 90, 

   BackgroundPlotInProgress = 0x20f, 

   BadColor = 0xd0, 

   BadColorIndex = 0xca, 

   BadDwgHeader = 0x13a, 

   BadDxfFile = 0x170, 

   BadDxfSequence = 0x34, 

   BadLayerName = 200, 

   BadLinetypeName = 0xcb, 

   BadLinetypeScale = 0xcc, 

   BadLineWeightValue = 0xcf, 

   BadlyNestedAppData = 0x17a, 

   BadPaperspaceView = 0xa9, 

   BadPlotStyleName = 0x180, 

   BadPlotStyleNameHandle = 0x183, 

   BadPlotStyleType = 0x182, 

   BadUcs = 0xa8, 

   BadVisibilityValue = 0xcd, 

   BinaryDataSizeExceeded = 0x187, 

   BlockDefInEntitySection = 0x17d, 

   BrokenHandle = 12, 

   BufferTooSmall = 7, 

   CannotBeErasedByCaller = 0x69, 

   CannotBeResurrected = 0x6a, 

   CannotChangeActiveViewport = 140, 

   CannotChangeColumnType = 0x1b9, 

   CannotExplodeEntity = 0x9f, 

   CannotNestBlockDefinitions = 0x3b, 

   CannotPlotToFile = 0x20c, 

   CannotRestoreFromAcisFile = 300, 

   CannotScaleNonUniformly = 0x88, 

   CantOpenFile = 0x16c, 

   CloseFailObjectDamaged = 0x68, 

   CloseModifyAborted = 0x66, 

   ClosePartialFailure = 0x67, 

   CloseWasNotifying = 0x65, 

   CommandWasInProgress = 0x8e, 

   ContainerNotEmpty = 0x12, 

   CopyDoesNotExist = 0x162, 

   CopyFailed = 0x164, 

   CopyInvalidName = 0x165, 

   CopyIsModelSpace = 0x163, 

   CopyNameExists = 0x166, 

   CreateFailed = 0x151, 

   CreateInvalidName = 0x152, 

   CustomSizeNotPossible = 0x202, 

   DatabaseObjectsOpen = 0x142, 

   DataLinkAdapterNotFound = 650, 

   DataLinkBadConnectionString = 0x28d, 

   DataLinkConnectionFailed = 0x290, 

   DataLinkInvalidAdapterId = 0x28b, 

   DataLinkNotFound = 0x28c, 

   DataLinkNotUpdatedYet = 0x28e, 

   DataLinkOtherError = 660, 

   DataLinkSourceIsWriteProtected = 0x292, 

   DataLinkSourceNotFound = 0x28f, 

   DegenerateGeometry = 0x99, 

   DelDoesNotExist = 0x156, 

   DeletedEntry = 0x1c, 

   DeleteEntity = 0xbf, 

   DelIsModelSpace = 0x157, 

   DelLastLayout = 0x158, 

   DelUnableToFind = 0x15a, 

   DelUnableToSetCurrent = 0x159, 

   DeviceNotFound = 0x1f8, 

   DocumentSwitchDisabled = 0x14e, 

   DuplicateBlockDefinition = 0x185, 

   DuplicateBlockName = 0x181, 

   DuplicateDxfField = 0x31, 

   DuplicateIndex = 0x19, 

   DuplicateKey = 0x17, 

   DuplicateLayerName = 0x17f, 

   DuplicateRecordName = 0x5f, 

   DwgCrcDoesNotMatch = 0x41, 

   DwgNeedsAFullSave = 0x45, 

   DwgNeedsRecovery = 190, 

   DwgNotRecoverable = 0x3d, 

   DwgObjectImproperlyRead = 0x43, 

   DwgRecoveredOK = 60, 

   DwgSentinelDoesNotMatch = 0x42, 

   DwgShareDemandLoad = 500, 

   DwgShareReadAccess = 0x1f5, 

   DwgShareWriteAccess = 0x1f6, 

   DwkLockFileFound = 0x4d, 

   DxbPartiallyRead = 0x40, 

   DxbReadAborted = 70, 

   DxfPartiallyRead = 0x3e, 

   DxfReadAborted = 0x3f, 

   EndOfFile = 0x29, 

   EndOfObject = 40, 

   EntityInInactiveLayout = 9, 

   ExcessiveItemCount = 0xa6, 

   ExplodeBeforeTransform = 0x87,

 
  ExternalDataSizeExceeded = 0x7d, 

   FileAccessErr = 0x48,

 
  FileExists = 0x16a, 

   FileInternalErr = 0x4a, 

   FileLockedByAutoCAD = 0x47, 

   FileMissingSections = 0x1b4, 

   FileNotFound = 0x4c, 

   FilerError = 0x35, 

   FileSharingViolation = 0x1b1, 

   FileSystemErr = 0x49,

 
  FileTooManyOpen = 0x4b, 

   FiniteStateMachineError = 0xc1, 

   FixedAllErrors = 120, 

   GeneralModelingFailure = 150, 

   GraphicsNotGenerated = 0x20b, 

   GuidNoAddress = 0x18a, 

   HadMultipleReaders = 0x5e,

 
  HandleExists = 10, 

   HandleInUse = 14,

 
  HatchTooDense = 420, 

   IgnoredLinetypeRedefinition = 0xa7, 

   IllegalEntityType = 0x15, 

   IllegalReplacement = 0x27, 

   IncompatiblePlotSettings = 0x1fc, 

   IncompleteBlockDefinition = 0x17b,

 
  IncompleteComplexObject = 380,

 
  InProcessOfCommitting = 0xfd,

 
  InsertAfter = 110,

 
  InternetBadPath = 0x4e23,

 
  InternetBase = 0x4e20,

 
  InternetCreateInternetSessionFailed = 0x4e33,

 
  InternetDirectoryFull = 0x4e27, 

   InternetDiskFull = 0x4e2a,

 
  InternetFileAccessDenied = 0x4e25, 

   InternetFileGenericError = 0x4e2b,

 
  InternetFileNotFound = 0x4e22,

 
  InternetFileOpenFailed = 0x4e37, 

   InternetGenericException = 0x4e51,

 
  InternetHardwareError = 0x4e28,

 
  InternetHttpAccessDenied = 0x4e3b, 

   InternetHttpBadGateway = 0x4e4c,

 
  InternetHttpBadMethod = 0x4e3f, 

   InternetHttpBadRequest = 0x4e3a,

 
  InternetHttpConflict = 0x4e43,

 
  InternetHttpGatewayTimeout = 0x4e4e,

 
  InternetHttpLengthRequired = 0x4e45,

 
  InternetHttpNoAcceptableResponse = 0x4e40,

 
  InternetHttpNotSupported = 0x4e4b,

 
  InternetHttpObjectNotFound = 0x4e3e, 

   InternetHttpOpenRequestFailed = 0x4e38, 

   InternetHttpPaymentRequired = 0x4e3c, 

   InternetHttpPreconditionFailure = 0x4e46, 

   InternetHttpProxyAuthorizationRequired = 0x4e41,

 
  InternetHttpRequestForbidden = 0x4e3d, 

   InternetHttpRequestTooLarge = 0x4e47, 

   InternetHttpResourceGone = 0x4e44, 

   InternetHttpServerError = 0x4e4a,

 
  InternetHttpServiceUnavailable = 0x4e4d,

 
  InternetHttpTimedOut = 0x4e42, 

   InternetHttpUnsupportedMedia = 0x4e49,

 
  InternetHttpUriTooLong = 0x4e48, 

   InternetHttpVersionNotSupported = 0x4e4f, 

   InternetInCache = 0x4e21, 

   InternetInternetError = 0x4e50,

 
  InternetInternetSessionConnectFailed = 0x4e34, 

   InternetInternetSessionOpenFailed = 0x4e35,

 
  InternetInvalidAccessType = 0x4e36, 

   InternetInvalidFileHandle = 0x4e26,

 
  InternetNoInternetSupport = 0x4e30, 

   InternetNotAnUrl = 0x4e2d,

 
  InternetNotImplemented = 0x4e31,

 
  InternetNoWinInternet = 0x4e2e,

 
  InternetOK = 0x4e20, 

   InternetOldWinInternet = 0x4e2f, 

   InternetProtocolNotSupported = 0x4e32,

 
  InternetSharingViolation = 0x4e29, 

   InternetTooManyOpenFiles = 0x4e24,

 
  InternetUnknownError = 0x4e52, 

   InternetUserCancelledTransfer = 0x4e39,

 
  InternetValidUrl = 0x4e2c,

 
  InvalidAdsName = 0x1f,

 
  InvalidAxis = 0x9a, 

   InvalidBlockName = 0x2f, 

   InvalidContext = 0x14f,

 
  InvalidDimStyle = 0xac,

 
  InvalidDwgVersion = 0x25,

 
  InvalidDxf2dPoint = 0x177

,
  InvalidDxf3dPoint = 0x178,

 
  InvalidDxfCode = 50,

 
  InvalidDxfSectionName = 0x173,

 
  InvalidEngineState = 0x205,

 
  InvalidExtents = 30, 

   InvalidFaceVertexIndex = 0x37,

 
  InvalidFileExtension = 360,

 
  InvalidFix = 0xc0, 

   InvalidIdMap = 220,

 
  InvalidIndex = 0x18,

 
  InvalidInput = 3,

 
  InvalidInterfaceId = 290,

 
  InvalidKey = 0x21, 

   InvalidLayer = 0xad, 

   InvalidMeshVertexIndex = 0x38, 

   InvalidNormal = 0x123,

 
  InvalidObjectId = 600,

 
  InvalidOffset = 0x9d, 

   InvalidOpenState = 8,

 
  InvalidOwnerObject = 0xdd,

 
  InvalidPlotArea = 0x201,

 
  InvalidPlotInfo = 520, 

   InvalidProfileName = 0x169, 

   InvalidResultBuffer = 0x33,

 
  InvalidStyle = 0x124, 

   InvalidSymbolTableName = 0x20, 

   InvalidSymTableFlag = 0xa1, 

   InvalidTextStyle = 0xa3,

 
  InvalidView = 0x1ff, 

   InvalidWindowArea = 0x200,

 
  InvalidXrefObjectId = 0x259,

 
  IsAnEntity = 0x8b,

 
  IsReading = 0x2a,

 
  IsWriteProtected = 0x5b, 

   IsWriting = 0x2b,

 
  IsXRefObject = 0x5c, 

   IteratorDone = 0x81, 

   KeyNotFound = 0x16, 

   LayerGroupCodeMissing = 0xc9,

 
  LayoutNotCurrent = 0x20a,

 
  LeftErrorsUnfixed = 0x7a, 

   LispActive = 0x14c, 

   LoadFailed = 0x1f7, 

   LockChangeInProgress = 0x143,

 
  LockConflict = 0x141,

 
  LockViolation = 320, 

   LongTransReferenceError = 0xff,

 
  MakeMeProxy = 0x12d, 

   MakeMeProxyAndResurrect = 0x1b0, 

   MaxLayouts = 0x198, 

   MissingBlockName = 390, 

   MissingDxfField = 0x30, 

   MissingDxfSection = 370, 

   MissingSymbolTable = 0x62, 

   MissingSymbolTableRecord = 0x63, 

   MustBe0to2 = 0x18b, 

   MustBe0to3 = 0x18c, 

   MustBe0to4 = 0x18d, 

   MustBe0to5 = 0x18e, 

   MustBe0to8 = 0x18f, 

   MustBe1to15 = 0x191, 

   MustBe1to6 = 0x195, 

   MustBe1to8 = 400, 

   MustBeNonNegative = 0x193, 

   MustBeNonZero = 0x194, 

   MustBePositive = 0x192,

 
  MustFirstAddBlockToDB = 0x3a,

 
  MustOpenThruOwner = 0x58, 

   MustPlotToFile = 0x20d,

 
  NegativeValueNotAllowed = 0x1d, 

   NlsFileNotAvailable = 0x12e, 

   NoActiveTransactions = 250, 

   NoBlockBegin = 0x17e, 

   NoClassId = 0x199, 

   NoCurrentConfig = 0x1f9,

 
  NoDatabase = 0x7c, 

   NoDocument = 330, 

   NoErrorHandler = 0x207, 

   NoFileName = 0x16d, 

   NoInputFiler = 0x44,

 
  NoInternalSpace = 0xab, 

   NoLabelBlock = 0x25b,

 
  NoLayout = 0x1fb, 

   NoMatchingMedia = 510, 

   NonCoplanarGeometry = 0x98, 

   NonePlotDevice = 0x1fd, 

   NonPlanarEntity = 0x9e, 

   NoPlotStyleTranslationTable = 0x196,

 
  NotAllowedForThisProxy = 0x12f, 

   NotAnEntity = 0x5d, 

   NotApplicable = 2, 

   NotCurrentDatabase = 0x8a,

 
  NotDxfHeaderGroupCode = 0x174,

 
  NotFromThisDocument = 0x14b, 

   NotHandled = 0x1af,

 
  NoThumbnailBitmap = 0x189, 

   NotImplementedYet = 1, 

   NotInBlock = 0x83, 

   NotInDatabase = 0x89, 

   NotInGroup = 0x105, 

   NotInitializedYet = 0x176, 

   NotInPaperspace = 0x8d, 

   NotMultiPageCapable = 0x20e, 

   NotNewlyCreated = 0xfe, 

   NotOpenForRead = 0x2c, 

   NotOpenForWrite = 0x2d, 

   NotSupportedInDwgApi = 310, 

   NotThatKindOfClass = 0x2e, 

   NotTopTransaction = 0xfb, 

   NoViewAssociation = 0x25a, 

   NoWorkSet = 0x100, 

   NullBlockName = 0x11, 

   NullEntityPointer = 20, 

   NullExtents = 0x138, 

   NullHandle = 11,

 
  NullIterator = 130, 

   NullObjectId = 0x10, 

   NullObjectPointer = 15,

 
  NullPtr = 0x1fa,

   NumberOfCopiesNotSupported = 0x209, 

   ObjectIsReferenced = 0x188, 

   ObjectToBeDeleted = 0x24, 

   ObsoleteFileFormat = 0x1b3, 

   OK = 0, 

   OnLockedLayer = 0x57, 

   OpenFileCancelled = 430, 

   OtherObjectsBusy = 0x39, 

   OutOfDisk = 0x1b,

 
  OutOfMemory = 6, 

   OutOfPagerMemory = 0xd3,

 
  OutOfRange = 0x97, 

   OwnerNotInDatabase = 0x84,

 
  OwnerNotOpenForRead = 0x85,

 
  OwnerNotOpenForWrite = 0x86, 

   OwnerNotSet = 0xde, 

   PageCancelled = 0x203, 

   PagerError = 210, 

   PagerWriteError = 0xd4,

 
  PermanentlyErased = 0x51,

 
  PlotAlreadyStarted = 0x206,

 
  PlotCancelled = 0x204, 

   PlotStyleInColorDependentMode = 0x197, 

   PointNotOnEntity = 0x9b, 

   PolyWidthLost = 0x137, 

   ProfileDoesNotExist = 0x167, 

   ProfileIsInUse = 0x16b, 

   ProperClassSeparatorExpected = 0xce, 

   RecordNotInTable = 0x80, 

   RegisteredApplicationIdNotFound = 0x7e,

 
  RegistryAccessError = 0x16e, 

   RegistryCreateError = 0x16f, 

   RenameDoesNotExist = 0x15c, 

   RenameInvalidLayoutName = 350, 

   RenameInvalidName = 0x160, 

   RenameIsModelSpace = 0x15d, 

   RenameLayoutAlreadyExists = 0x15f, 

   RepeatedDwgRead = 0x1b5, 

   RepeatEntity = 0x7f, 

   RowsMustMatchColumns = 0x1ba, 

   SecErrorCipherNotSupported = 0x4b2, 

   SecErrorComputingSignature = 0x44f, 

   SecErrorDecryptingData = 0x4b3,

 
  SecErrorEncryptingData = 0x4b1, 

   SecErrorGeneratingTimestamp = 0x44e, 

   SecErrorReadingFile = 0x3ea, 

   SecErrorWritingFile = 0x3eb,

 
  SecErrorWritingSignature = 0x450, 

   SecInitializationFailure = 0x3e9,

 
  SecInvalidDigitalId = 0x44d,

 
  SelfReference = 0x61, 

   SetFailed = 340, 

   SingularPoint = 0x9c,

 
  SomeInputDataLeftUnread = 170, 

   StringTooLong = 160, 

   SubentitiesStillOpen = 0x59, 

   SubSelectionSetEmpty = 550,

 
  TargetDocNotQuiescent = 0x14d,

 
  TooFewLineTypeElements = 0xa4, 

   TooFewVertices = 0xe8,

 
  TooManyLineTypeElements = 0xa5,

 
  TooManyVertices = 0xe7, 

   TransactionOpenWhileCommandEnded = 0xfc, 

   UnableToGetLabelBlock = 0x25f, 

   UnableToGetViewAssociation = 0x25d, 

   UnableToRemoveAssociation = 0x260, 

   UnableToSetLabelBlock = 0x25e, 

   UnableToSetViewAssociation = 0x25c, 

   UnableToSyncModelView = 0x261,

 
  UndefinedDxfGroupCode = 0x175, 

   UndefinedLineType = 0xa2, 

   UndefineShapeName = 0x184, 

   UndoNoGroupBegin = 0x19b, 

   UndoOperationNotAvailable = 410, 

   UnknownDxfFileFormat = 0x171, 

   UnknownHandle = 13,

 
  UnrecoverableErrors = 0x7b, 

   UnsupportedFileFormat = 0x1b2, 

   UserBreak = 180,

 
  VertexAfterFace = 0x36, 

   Vetoed = 0x145, 

   WasErased = 80, 

   WasNotErased = 0x6b, 

   WasNotForwarding = 0xd5, 

   WasNotifying = 0x55, 

   WasNotOpenForWrite = 100, 

   WasOpenForNotify = 0x56, 

   WasOpenForRead = 0x52, 

   WasOpenForUndo = 0x54, 

   WasOpenForWrite = 0x53, 

   WrongCellType = 440,

 
  WrongDatabase = 0x23, 

   WrongObjectType = 0x22,

 
  WrongSubentityType = 230, 

   XRefDependent = 0x60