Review compiler errors/warnings to identify candidates for code fixes

[sharwell]

We should enumerate all current diagnostics (errors/warnings) produced by the C# and VB compilers, and identify candidates for code fixes.

Filed in response to #23323, but definitely not the only time it's come up for me.

@gafter @kuhlenh

[AdamSpeight2008]

Sounds like a good candidate for Up for Grabs Community contributions. Especially if reward targeted.

The great big C# and VB fixer upper challenge.

[MaStr11]

I don't know if this is helpful but here you can find an Excel sheet with all C# compiler errors (extracted from ErrorCode.cs). I joined the CSharpResources.resx to get a description and looked up the corresponding github.com/dotnet/docs/tree/master/docs/csharp/language-reference/compiler-messages markdown file. I have also binged the error code like this site:stackoverflow.com cs1503 and took the number of matches as a score how often the error troubles customers. This sheet was created via a PowerQuery script but because it contains a bing API key I only published the raw data.

[sharwell]

These are sorted by ID, but we can use the priority from the spreadsheet as the order to actually file issues.

Errors

Name	ID	Code Fix (issue or status)
ERR_NoMetadataFile	CS0006
ERR_NoTypeDef	CS0012
ERR_OutputWriteFailed	CS0016
ERR_MultipleEntryPoints	CS0017
ERR_BadBinaryOps	CS0019
ERR_IntDivByZero	CS0020
ERR_BadIndexLHS	CS0021
ERR_BadIndexCount	CS0022
ERR_BadUnaryOp	CS0023
ERR_ThisInStaticMeth	CS0026
ERR_ThisInBadContext	CS0027
ERR_NoImplicitConv	CS0029
ERR_NoExplicitConv	CS0030
ERR_ConstOutOfRange	CS0031
ERR_AmbigBinaryOps	CS0034
ERR_AmbigUnaryOp	CS0035
ERR_InAttrOnOutParam	CS0036
ERR_ValueCantBeNull	CS0037
ERR_NoExplicitBuiltinConv	CS0039
ERR_BadVisReturnType	CS0050
ERR_BadVisParamType	CS0051
ERR_BadVisFieldType	CS0052
ERR_BadVisPropertyType	CS0053
ERR_BadVisIndexerReturn	CS0054
ERR_BadVisIndexerParam	CS0055
ERR_BadVisOpReturn	CS0056
ERR_BadVisOpParam	CS0057
ERR_BadVisDelegateReturn	CS0058
ERR_BadVisDelegateParam	CS0059
ERR_BadVisBaseClass	CS0060
ERR_BadVisBaseInterface	CS0061
ERR_EventNeedsBothAccessors	CS0065
ERR_EventNotDelegate	CS0066
ERR_InterfaceEventInitializer	CS0068
ERR_EventPropertyInInterface	CS0069
ERR_BadEventUsage	CS0070
ERR_ExplicitEventFieldImpl	CS0071
ERR_CantOverrideNonEvent	CS0072
ERR_AddRemoveMustHaveBody	CS0073
ERR_AbstractEventInitializer	CS0074
ERR_PossibleBadNegCast	CS0075
ERR_ReservedEnumerator	CS0076
ERR_AsMustHaveReferenceType	CS0077
ERR_BadEventUsageNoField	CS0079
ERR_ConstraintOnlyAllowedOnGenericDecl	CS0080
ERR_TypeParamMustBeIdentifier	CS0081
ERR_MemberReserved	CS0082
ERR_DuplicateParamName	CS0100
ERR_DuplicateNameInNS	CS0101
ERR_DuplicateNameInClass	CS0102
ERR_NameNotInContext	CS0103
ERR_AmbigContext	CS0104
ERR_BadMemberFlag	CS0106
ERR_BadMemberProtection	CS0107
ERR_CircConstValue	CS0110
ERR_MemberAlreadyExists	CS0111
ERR_StaticNotVirtual	CS0112
ERR_OverrideNotNew	CS0113
ERR_OverrideNotExpected	CS0115
ERR_NamespaceUnexpected	CS0116
ERR_NoSuchMember	CS0117
ERR_BadSKknown	CS0118
ERR_BadSKunknown	CS0119
ERR_ObjectRequired	CS0120
ERR_AmbigCall	CS0121
ERR_BadAccess	CS0122
ERR_MethDelegateMismatch	CS0123
ERR_RetObjectRequired	CS0126
ERR_RetNoObjectRequired	CS0127
ERR_LocalDuplicate	CS0128
ERR_AssgLvalueExpected	CS0131
ERR_StaticConstParam	CS0132
ERR_NotConstantExpression	CS0133
ERR_NotNullConstRefField	CS0134
ERR_LocalIllegallyOverrides	CS0136
ERR_BadUsingNamespace	CS0138
ERR_NoBreakOrCont	CS0139
ERR_DuplicateLabel	CS0140
ERR_NoConstructors	CS0143
ERR_NoNewAbstract	CS0144
ERR_ConstValueRequired	CS0145
ERR_CircularBase	CS0146
ERR_BadDelegateConstructor	CS0148
ERR_MethodNameExpected	CS0149
ERR_ConstantExpected	CS0150
ERR_V6SwitchGoverningTypeValueExpected	CS0151
ERR_DuplicateCaseLabel	CS0152
ERR_InvalidGotoCase	CS0153
ERR_PropertyLacksGet	CS0154
ERR_BadExceptionType	CS0155
ERR_BadEmptyThrow	CS0156
ERR_BadFinallyLeave	CS0157
ERR_LabelShadow	CS0158
ERR_LabelNotFound	CS0159
ERR_UnreachableCatch	CS0160
ERR_ReturnExpected	CS0161
ERR_SwitchFallThrough	CS0163
ERR_UseDefViolation	CS0165
ERR_UseDefViolationField	CS0170
ERR_UnassignedThis	CS0171
ERR_AmbigQM	CS0172
ERR_InvalidQM	CS0173
ERR_NoBaseClass	CS0174
ERR_BaseIllegal	CS0175
ERR_ObjectProhibited	CS0176
ERR_ParamUnassigned	CS0177
ERR_InvalidArray	CS0178
ERR_ExternHasBody	CS0179
ERR_AbstractAndExtern	CS0180
ERR_BadAttributeParamType	CS0181
ERR_BadAttributeArgument	CS0182
ERR_LockNeedsReference	CS0185
ERR_NullNotValid	CS0186
ERR_UseDefViolationThis	CS0188
ERR_ArgsInvalid	CS0190
ERR_AssgReadonly	CS0191
ERR_RefReadonly	CS0192
ERR_PtrExpected	CS0193
ERR_PtrIndexSingle	CS0196
ERR_AssgReadonlyStatic	CS0198
ERR_RefReadonlyStatic	CS0199
ERR_AssgReadonlyProp	CS0200
ERR_IllegalStatement	CS0201
ERR_BadGetEnumerator	CS0202
ERR_TooManyLocals	CS0204
ERR_AbstractBaseCall	CS0205
ERR_RefProperty	CS0206
ERR_ManagedAddr	CS0208
ERR_BadFixedInitType	CS0209
ERR_FixedMustInit	CS0210
ERR_InvalidAddrOp	CS0211
ERR_FixedNeeded	CS0212
ERR_FixedNotNeeded	CS0213
ERR_UnsafeNeeded	CS0214
ERR_OpTFRetType	CS0215
ERR_OperatorNeedsMatch	CS0216
ERR_BadBoolOp	CS0217
ERR_MustHaveOpTF	CS0218
ERR_CheckedOverflow	CS0220
ERR_ConstOutOfRangeChecked	CS0221
ERR_BadVarargs	CS0224
ERR_ParamsMustBeArray	CS0225
ERR_IllegalArglist	CS0226
ERR_IllegalUnsafe	CS0227
ERR_AmbigMember	CS0229
ERR_BadForeachDecl	CS0230
ERR_ParamsLast	CS0231
ERR_SizeofUnsafe	CS0233
ERR_DottedTypeNameNotFoundInNS	CS0234
ERR_FieldInitRefNonstatic	CS0236
ERR_SealedNonOverride	CS0238
ERR_CantOverrideSealed	CS0239
ERR_VoidError	CS0242
ERR_ConditionalOnOverride	CS0243
ERR_PointerInAsOrIs	CS0244
ERR_CallingFinalizeDeprecated	CS0245
ERR_SingleTypeNameNotFound	CS0246
ERR_NegativeStackAllocSize	CS0247
ERR_NegativeArraySize	CS0248
ERR_OverrideFinalizeDeprecated	CS0249
ERR_CallingBaseFinalizeDeprecated	CS0250
ERR_BadCastInFixed	CS0254
ERR_StackallocInCatchFinally	CS0255
ERR_VarargsLast	CS0257
ERR_MissingPartial	CS0260
ERR_PartialTypeKindConflict	CS0261
ERR_PartialModifierConflict	CS0262
ERR_PartialMultipleBases	CS0263
ERR_PartialWrongTypeParams	CS0264
ERR_PartialWrongConstraints	CS0265
ERR_NoImplicitConvCast	CS0266
ERR_PartialMisplaced	CS0267
ERR_ImportedCircularBase	CS0268
ERR_UseDefViolationOut	CS0269
ERR_ArraySizeInDeclaration	CS0270
ERR_InaccessibleGetter	CS0271
ERR_InaccessibleSetter	CS0272
ERR_InvalidPropertyAccessMod	CS0273
ERR_DuplicatePropertyAccessMods	CS0274
ERR_PropertyAccessModInInterface	CS0275
ERR_AccessModMissingAccessor	CS0276
ERR_UnimplementedInterfaceAccessor	CS0277
ERR_FriendRefNotEqualToThis	CS0281
ERR_BadConstType	CS0283
ERR_NoNewTyvar	CS0304
ERR_BadArity	CS0305
ERR_BadTypeArgument	CS0306
ERR_TypeArgsNotAllowed	CS0307
ERR_HasNoTypeVars	CS0308
ERR_NewConstraintNotSatisfied	CS0310
ERR_GenericConstraintNotSatisfiedRefType	CS0311
ERR_GenericConstraintNotSatisfiedNullableEnum	CS0312
ERR_GenericConstraintNotSatisfiedNullableInterface	CS0313
ERR_GenericConstraintNotSatisfiedTyVar	CS0314
ERR_GenericConstraintNotSatisfiedValType	CS0315
ERR_DuplicateGeneratedName	CS0316
ERR_GlobalSingleTypeNameNotFound	CS0400
ERR_NewBoundMustBeLast	CS0401
ERR_TypeVarCantBeNull	CS0403
ERR_AttributeCantBeGeneric	CS0404
ERR_DuplicateBound	CS0405
ERR_ClassBoundNotFirst	CS0406
ERR_BadRetType	CS0407
ERR_DuplicateConstraintClause	CS0409
ERR_CantInferMethTypeArgs	CS0411
ERR_LocalSameNameAsTypeParam	CS0412
ERR_AsWithTypeVar	CS0413
ERR_BadIndexerNameAttr	CS0415
ERR_AttrArgWithTypeVars	CS0416
ERR_NewTyvarWithArgs	CS0417
ERR_AbstractSealedStatic	CS0418
ERR_ComImportWithImpl	CS0423
ERR_ComImportWithBase	CS0424
ERR_ImplBadConstraints	CS0425
ERR_DottedTypeNameNotFoundInAgg	CS0426
ERR_MethGrpToNonDel	CS0428
ERR_BadExternAlias	CS0430
ERR_ColColWithTypeAlias	CS0431
ERR_AliasNotFound	CS0432
ERR_SameFullNameAggAgg	CS0433
ERR_SameFullNameNsAgg	CS0434
ERR_SameFullNameThisAggThisNs	CS0438
ERR_ExternAfterElements	CS0439
ERR_SealedStaticClass	CS0441
ERR_PrivateAbstractAccessor	CS0442
ERR_ValueExpected	CS0443
ERR_UnboxNotLValue	CS0445
ERR_AnonMethGrpInForEach	CS0446
ERR_BadIncDecRetType	CS0448
ERR_RefValBoundMustBeFirst	CS0449
ERR_RefValBoundWithClass	CS0450
ERR_NewBoundWithVal	CS0451
ERR_RefConstraintNotSatisfied	CS0452
ERR_ValConstraintNotSatisfied	CS0453
ERR_CircularConstraint	CS0454
ERR_BaseConstraintConflict	CS0455
ERR_ConWithValCon	CS0456
ERR_AmbigUDConv	CS0457
ERR_OverrideWithConstraints	CS0460
ERR_AmbigOverride	CS0462
ERR_DecConstError	CS0463
ERR_ExplicitImplParams	CS0466
ERR_MethodImplementingAccessor	CS0470
ERR_AbstractHasBody	CS0500
ERR_ConcreteMissingBody	CS0501
ERR_AbstractAndSealed	CS0502
ERR_AbstractNotVirtual	CS0503
ERR_StaticConstant	CS0504
ERR_CantOverrideNonFunction	CS0505
ERR_CantOverrideNonVirtual	CS0506
ERR_CantChangeAccessOnOverride	CS0507
ERR_CantChangeReturnTypeOnOverride	CS0508
ERR_CantDeriveFromSealedType	CS0509
ERR_AbstractInConcreteClass	CS0513
ERR_StaticConstructorWithExplicitConstructorCall	CS0514
ERR_StaticConstructorWithAccessModifiers	CS0515
ERR_RecursiveConstructorCall	CS0516
ERR_ObjectCallingBaseConstructor	CS0517
ERR_PredefinedTypeNotFound	CS0518
ERR_StructWithBaseConstructorCall	CS0522
ERR_StructLayoutCycle	CS0523
ERR_InterfacesCannotContainTypes	CS0524
ERR_InterfacesCantContainFields	CS0525
ERR_InterfacesCantContainConstructors	CS0526
ERR_NonInterfaceInInterfaceList	CS0527
ERR_DuplicateInterfaceInBaseList	CS0528
ERR_CycleInInterfaceInheritance	CS0529
ERR_InterfaceMemberHasBody	CS0531
ERR_HidingAbstractMethod	CS0533
ERR_UnimplementedAbstractMethod	CS0534
ERR_UnimplementedInterfaceMember	CS0535
ERR_ObjectCantHaveBases	CS0537
ERR_ExplicitInterfaceImplementationNotInterface	CS0538
ERR_InterfaceMemberNotFound	CS0539
ERR_ClassDoesntImplementInterface	CS0540
ERR_ExplicitInterfaceImplementationInNonClassOrStruct	CS0541
ERR_MemberNameSameAsType	CS0542
ERR_EnumeratorOverflow	CS0543
ERR_CantOverrideNonProperty	CS0544
ERR_NoGetToOverride	CS0545
ERR_NoSetToOverride	CS0546
ERR_PropertyCantHaveVoidType	CS0547
ERR_PropertyWithNoAccessors	CS0548
ERR_NewVirtualInSealed	CS0549
ERR_ExplicitPropertyAddingAccessor	CS0550
ERR_ExplicitPropertyMissingAccessor	CS0551
ERR_ConversionWithInterface	CS0552
ERR_ConversionWithBase	CS0553
ERR_ConversionWithDerived	CS0554
ERR_IdentityConversion	CS0555
ERR_ConversionNotInvolvingContainedType	CS0556
ERR_DuplicateConversionInClass	CS0557
ERR_OperatorsMustBeStatic	CS0558
ERR_BadIncDecSignature	CS0559
ERR_BadUnaryOperatorSignature	CS0562
ERR_BadBinaryOperatorSignature	CS0563
ERR_BadShiftOperatorSignature	CS0564
ERR_InterfacesCantContainOperators	CS0567
ERR_StructsCantContainDefaultConstructor	CS0568
ERR_CantOverrideBogusMethod	CS0569
ERR_BindToBogus	CS0570
ERR_CantCallSpecialMethod	CS0571
ERR_BadTypeReference	CS0572
ERR_FieldInitializerInStruct	CS0573
ERR_BadDestructorName	CS0574
ERR_OnlyClassesCanContainDestructors	CS0575
ERR_ConflictAliasAndMember	CS0576
ERR_ConditionalOnSpecialMethod	CS0577
ERR_ConditionalMustReturnVoid	CS0578
ERR_DuplicateAttribute	CS0579
ERR_ConditionalOnInterfaceMethod	CS0582
ERR_OperatorCantReturnVoid	CS0590
ERR_InvalidAttributeArgument	CS0591
ERR_AttributeOnBadSymbolType	CS0592
ERR_FloatOverflow	CS0594
ERR_InvalidReal	CS0595
ERR_ComImportWithoutUuidAttribute	CS0596
ERR_InvalidNamedArgument	CS0599
ERR_DllImportOnInvalidMethod	CS0601
ERR_FieldCantBeRefAny	CS0610
ERR_ArrayElementCantBeRefAny	CS0611
ERR_NotAnAttributeClass	CS0616
ERR_BadNamedAttributeArgument	CS0617
ERR_DeprecatedSymbolStr	CS0619
ERR_IndexerCantHaveVoidType	CS0620
ERR_VirtualPrivate	CS0621
ERR_ArrayInitToNonArrayType	CS0622
ERR_ArrayInitInBadPlace	CS0623
ERR_MissingStructOffset	CS0625
ERR_InterfaceImplementedByConditional	CS0629
ERR_IllegalRefParam	CS0631
ERR_BadArgumentToAttribute	CS0633
ERR_StructOffsetOnBadStruct	CS0636
ERR_StructOffsetOnBadField	CS0637
ERR_AttributeUsageOnNonAttributeClass	CS0641
ERR_DuplicateNamedAttributeArgument	CS0643
ERR_DeriveFromEnumOrValueType	CS0644
ERR_DefaultMemberOnIndexedType	CS0646
ERR_BogusType	CS0648
ERR_CStyleArray	CS0650
ERR_AbstractAttributeClass	CS0653
ERR_BadNamedAttributeArgumentType	CS0655
ERR_MissingPredefinedMember	CS0656
ERR_OutAttrOnRefParam	CS0662
ERR_OverloadRefKind	CS0663
ERR_LiteralDoubleCast	CS0664
ERR_ProtectedInStruct	CS0666
ERR_InconsistentIndexerNames	CS0668
ERR_ComImportWithUserCtor	CS0669
ERR_FieldCantHaveVoidType	CS0670
ERR_SystemVoid	CS0673
ERR_ExplicitParamArray	CS0674
ERR_VolatileStruct	CS0677
ERR_VolatileAndReadonly	CS0678
ERR_AbstractField	CS0681
ERR_BogusExplicitImpl	CS0682
ERR_ExplicitMethodImplAccessor	CS0683
ERR_ConditionalWithOutParam	CS0685
ERR_AccessorImplementingMethod	CS0686
ERR_AliasQualAsExpression	CS0687
ERR_DerivingFromATyVar	CS0689
ERR_DuplicateTypeParameter	CS0692
ERR_TypeVariableSameAsParent	CS0694
ERR_UnifyingInterfaceInstantiations	CS0695
ERR_GenericDerivingFromAttribute	CS0698
ERR_TyVarNotFoundInConstraint	CS0699
ERR_BadBoundType	CS0701
ERR_SpecialTypeAsBound	CS0702
ERR_BadVisBound	CS0703
ERR_LookupInTypeVariable	CS0704
ERR_BadConstraintType	CS0706
ERR_InstanceMemberInStaticClass	CS0708
ERR_StaticBaseClass	CS0709
ERR_ConstructorInStaticClass	CS0710
ERR_DestructorInStaticClass	CS0711
ERR_InstantiatingStaticClass	CS0712
ERR_StaticDerivedFromNonObject	CS0713
ERR_StaticClassInterfaceImpl	CS0714
ERR_OperatorInStaticClass	CS0715
ERR_ConvertToStaticClass	CS0716
ERR_ConstraintIsStaticClass	CS0717
ERR_GenericArgIsStaticClass	CS0718
ERR_ArrayOfStaticClass	CS0719
ERR_IndexerInStaticClass	CS0720
ERR_ParameterIsStaticClass	CS0721
ERR_ReturnTypeIsStaticClass	CS0722
ERR_VarDeclIsStaticClass	CS0723
ERR_BadEmptyThrowInFinally	CS0724
ERR_InvalidSpecifier	CS0726
ERR_ForwardedTypeInThisAssembly	CS0729
ERR_ForwardedTypeIsNested	CS0730
ERR_CycleInTypeForwarder	CS0731
ERR_AssemblyNameOnNonModule	CS0734
ERR_InvalidFwdType	CS0735
ERR_CloseUnimplementedInterfaceMemberStatic	CS0736
ERR_CloseUnimplementedInterfaceMemberNotPublic	CS0737
ERR_CloseUnimplementedInterfaceMemberWrongReturnType	CS0738
ERR_DuplicateTypeForwarder	CS0739
ERR_ExpectedSelectOrGroup	CS0742
ERR_ExpectedContextualKeywordOn	CS0743
ERR_ExpectedContextualKeywordEquals	CS0744
ERR_ExpectedContextualKeywordBy	CS0745
ERR_InvalidAnonymousTypeMemberDeclarator	CS0746
ERR_InvalidInitializerElementInitializer	CS0747
ERR_InconsistentLambdaParameterUsage	CS0748
ERR_PartialMethodInvalidModifier	CS0750
ERR_PartialMethodOnlyInPartialClass	CS0751
ERR_PartialMethodCannotHaveOutParameters	CS0752
ERR_PartialMethodNotExplicit	CS0754
ERR_PartialMethodExtensionDifference	CS0755
ERR_PartialMethodOnlyOneLatent	CS0756
ERR_PartialMethodOnlyOneActual	CS0757
ERR_PartialMethodParamsDifference	CS0758
ERR_PartialMethodMustHaveLatent	CS0759
ERR_PartialMethodInconsistentConstraints	CS0761
ERR_PartialMethodToDelegate	CS0762
ERR_PartialMethodStaticDifference	CS0763
ERR_PartialMethodUnsafeDifference	CS0764
ERR_PartialMethodInExpressionTree	CS0765
ERR_PartialMethodMustReturnVoid	CS0766
ERR_ExplicitImplCollisionOnRefOut	CS0767
ERR_IndirectRecursiveConstructorCall	CS0768
ERR_ImplicitlyTypedVariableAssignedBadValue	CS0815
ERR_ImplicitlyTypedVariableWithNoInitializer	CS0818
ERR_ImplicitlyTypedVariableMultipleDeclarator	CS0819
ERR_ImplicitlyTypedVariableAssignedArrayInitializer	CS0820
ERR_ImplicitlyTypedLocalCannotBeFixed	CS0821
ERR_ImplicitlyTypedVariableCannotBeConst	CS0822
ERR_TypeVarNotFound	CS0825
ERR_ImplicitlyTypedArrayNoBestType	CS0826
ERR_AnonymousTypePropertyAssignedBadValue	CS0828
ERR_ExpressionTreeContainsBaseAccess	CS0831
ERR_ExpressionTreeContainsAssignment	CS0832
ERR_AnonymousTypeDuplicatePropertyName	CS0833
ERR_StatementLambdaToExpressionTree	CS0834
ERR_ExpressionTreeMustHaveDelegate	CS0835
ERR_AnonymousTypeNotAvailable	CS0836
ERR_LambdaInIsAs	CS0837
ERR_ExpressionTreeContainsMultiDimensionalArrayInitializer	CS0838
ERR_MissingArgument	CS0839
ERR_VariableUsedBeforeDeclaration	CS0841
ERR_ExplicitLayoutAndAutoImplementedProperty	CS0842
ERR_UnassignedThisAutoProperty	CS0843
ERR_VariableUsedBeforeDeclarationAndHidesField	CS0844
ERR_ExpressionTreeContainsBadCoalesce	CS0845
ERR_ArrayInitializerExpected	CS0846
ERR_ArrayInitializerIncorrectLength	CS0847
ERR_ExpressionTreeContainsNamedArgument	CS0853
ERR_ExpressionTreeContainsOptionalArgument	CS0854
ERR_ExpressionTreeContainsIndexedProperty	CS0855
ERR_IndexedPropertyRequiresParams	CS0856
ERR_IndexedPropertyMustHaveAllOptionalParams	CS0857
ERR_IdentifierExpected	CS1001
ERR_SemicolonExpected	CS1002
ERR_SyntaxError	CS1003
ERR_DuplicateModifier	CS1004
ERR_DuplicateAccessor	CS1007
ERR_IntegralTypeExpected	CS1008
ERR_IllegalEscape	CS1009
ERR_NewlineInConst	CS1010
ERR_EmptyCharConst	CS1011
ERR_TooManyCharsInConst	CS1012
ERR_InvalidNumber	CS1013
ERR_GetOrSetExpected	CS1014
ERR_ClassTypeExpected	CS1015
ERR_NamedArgumentExpected	CS1016
ERR_TooManyCatches	CS1017
ERR_ThisOrBaseExpected	CS1018
ERR_OvlUnaryOperatorExpected	CS1019
ERR_OvlBinaryOperatorExpected	CS1020
ERR_IntOverflow	CS1021
ERR_EOFExpected	CS1022
ERR_BadEmbeddedStmt	CS1023
ERR_PPDirectiveExpected	CS1024
ERR_EndOfPPLineExpected	CS1025
ERR_CloseParenExpected	CS1026
ERR_EndifDirectiveExpected	CS1027
ERR_UnexpectedDirective	CS1028
ERR_ErrorDirective	CS1029
ERR_TypeExpected	CS1031
ERR_PPDefFollowsToken	CS1032
ERR_OpenEndedComment	CS1035
ERR_OvlOperatorExpected	CS1037
ERR_EndRegionDirectiveExpected	CS1038
ERR_UnterminatedStringLit	CS1039
ERR_BadDirectivePlacement	CS1040
ERR_IdentifierExpectedKW	CS1041
ERR_SemiOrLBraceExpected	CS1043
ERR_MultiTypeInDeclaration	CS1044
ERR_AddOrRemoveExpected	CS1055
ERR_UnexpectedCharacter	CS1056
ERR_ProtectedInStatic	CS1057
ERR_IncrementLvalueExpected	CS1059
ERR_NoSuchMemberOrExtension	CS1061
ERR_DeprecatedCollectionInitAddStr	CS1063
ERR_DefaultValueNotAllowed	CS1065
ERR_PartialWrongTypeParamsVariance	CS1067
ERR_GlobalSingleTypeNameNotFoundFwd	CS1068
ERR_DottedTypeNameNotFoundInNSFwd	CS1069
ERR_SingleTypeNameNotFoundFwd	CS1070
ERR_UnexpectedToken	CS1073
ERR_BadThisParam	CS1100
ERR_BadTypeforThis	CS1103
ERR_BadParamModThis	CS1104
ERR_BadExtensionMeth	CS1105
ERR_BadExtensionAgg	CS1106
ERR_DupParamMod	CS1107
ERR_ExtensionMethodsDecl	CS1109
ERR_ExtensionAttrNotFound	CS1110
ERR_ExplicitExtension	CS1112
ERR_ValueTypeExtDelegate	CS1113
ERR_BadArgCount	CS1501
ERR_BadArgType	CS1503
ERR_NoSourceFile	CS1504
ERR_CantRefResource	CS1507
ERR_ResourceNotUnique	CS1508
ERR_ImportNonAssembly	CS1509
ERR_RefLvalueExpected	CS1510
ERR_BaseInStaticMeth	CS1511
ERR_BaseInBadContext	CS1512
ERR_RbraceExpected	CS1513
ERR_LbraceExpected	CS1514
ERR_InExpected	CS1515
ERR_InvalidPreprocExpr	CS1517
ERR_InvalidMemberDecl	CS1519
ERR_MemberNeedsType	CS1520
ERR_BadBaseType	CS1521
ERR_ExpectedEndTry	CS1524
ERR_InvalidExprTerm	CS1525
ERR_BadNewExpr	CS1526
ERR_NoNamespacePrivate	CS1527
ERR_BadVarDecl	CS1528
ERR_UsingAfterElements	CS1529
ERR_BadBinOpArgs	CS1534
ERR_BadUnOpArgs	CS1535
ERR_NoVoidParameter	CS1536
ERR_DuplicateAlias	CS1537
ERR_BadProtectedAccess	CS1540
ERR_AddModuleAssembly	CS1542
ERR_BindToBogusProp2	CS1545
ERR_BindToBogusProp1	CS1546
ERR_NoVoidHere	CS1547
ERR_IndexerNeedsParam	CS1551
ERR_BadArraySyntax	CS1552
ERR_BadOperatorSyntax	CS1553
ERR_MainClassNotFound	CS1555
ERR_MainClassNotClass	CS1556
ERR_NoMainInClass	CS1558
ERR_OutputNeedsName	CS1562
ERR_CantHaveWin32ResAndManifest	CS1564
ERR_CantHaveWin32ResAndIcon	CS1565
ERR_CantReadResource	CS1566
ERR_DocFileGen	CS1569
ERR_BadStackAllocExpr	CS1575
ERR_InvalidLineNumber	CS1576
ERR_MissingPPFile	CS1578
ERR_ForEachMissingMember	CS1579
ERR_BadWin32Res	CS1583
ERR_BadModifierLocation	CS1585
ERR_MissingArraySize	CS1586
ERR_BadDelArgCount	CS1593
ERR_UnexpectedSemicolon	CS1597
ERR_MethodReturnCantBeRefAny	CS1599
ERR_CompileCancelled	CS1600
ERR_MethodArgCantBeRefAny	CS1601
ERR_AssgReadonlyLocal	CS1604
ERR_RefReadonlyLocal	CS1605
ERR_CantUseRequiredAttribute	CS1608
ERR_NoModifiersOnAccessor	CS1609
ERR_ParamsCantBeWithModifier	CS1611
ERR_ReturnNotLValue	CS1612
ERR_MissingCoClass	CS1613
ERR_AmbiguousAttribute	CS1614
ERR_BadArgExtraRef	CS1615	#44187
ERR_BadCompatMode	CS1617
ERR_DelegateOnConditional	CS1618
ERR_CantMakeTempFile	CS1619
ERR_BadArgRef	CS1620
ERR_YieldInAnonMeth	CS1621
ERR_ReturnInIterator	CS1622
ERR_BadIteratorArgType	CS1623
ERR_BadIteratorReturn	CS1624
ERR_BadYieldInFinally	CS1625
ERR_BadYieldInTryOfCatch	CS1626
ERR_EmptyYield	CS1627
ERR_AnonDelegateCantUse	CS1628
ERR_IllegalInnerUnsafe	CS1629
ERR_BadYieldInCatch	CS1631
ERR_BadDelegateLeave	CS1632
ERR_VarargsIterator	CS1636
ERR_UnsafeIteratorArgType	CS1637
ERR_BadCoClassSig	CS1639
ERR_MultipleIEnumOfT	CS1640
ERR_FixedDimsRequired	CS1641
ERR_FixedNotInStruct	CS1642
ERR_AnonymousReturnExpected	CS1643
ERR_ExpectedVerbatimLiteral	CS1646
ERR_AssgReadonly2	CS1648
ERR_RefReadonly2	CS1649
ERR_AssgReadonlyStatic2	CS1650
ERR_RefReadonlyStatic2	CS1651
ERR_AssgReadonlyLocal2Cause	CS1654
ERR_RefReadonlyLocal2Cause	CS1655
ERR_AssgReadonlyLocalCause	CS1656
ERR_RefReadonlyLocalCause	CS1657
ERR_AnonMethToNonDel	CS1660
ERR_CantConvAnonMethParams	CS1661
ERR_CantConvAnonMethReturns	CS1662
ERR_IllegalFixedType	CS1663
ERR_FixedOverflow	CS1664
ERR_InvalidFixedArraySize	CS1665
ERR_FixedBufferNotFixed	CS1666
ERR_AttributeNotOnAccessor	CS1667
ERR_IllegalVarArgs	CS1669
ERR_IllegalParams	CS1670
ERR_BadModifiersOnNamespace	CS1671
ERR_BadPlatformType	CS1672
ERR_ThisStructNotInAnonMeth	CS1673
ERR_NoConvToIDisp	CS1674
ERR_BadParamRef	CS1676
ERR_BadParamExtraRef	CS1677
ERR_BadParamType	CS1678
ERR_BadExternIdentifier	CS1679
ERR_AliasMissingFile	CS1680
ERR_GlobalExternAlias	CS1681
ERR_LocalCantBeFixedAndHoisted	CS1686
ERR_CantConvAnonMethNoParams	CS1688
ERR_ConditionalOnNonAttributeClass	CS1689
ERR_DuplicateImport	CS1703
ERR_DuplicateImportSimple	CS1704
ERR_AssemblyMatchBadVersion	CS1705
ERR_FixedNeedsLvalue	CS1708
ERR_CantChangeTypeOnOverride	CS1715
ERR_DoNotUseFixedBufferAttr	CS1716
ERR_CantOpenWin32Res	CS1719
ERR_NoMultipleInheritance	CS1721
ERR_BaseClassMustBeFirst	CS1722
ERR_FriendAssemblyBadArgs	CS1725
ERR_FriendAssemblySNReq	CS1726
ERR_DelegateOnNullable	CS1728
ERR_BadCtorArgCount	CS1729
ERR_GlobalAttributesNotFirst	CS1730
ERR_ExpressionExpected	CS1733
ERR_DefaultValueMustBeConstant	CS1736
ERR_DefaultValueBeforeRequiredValue	CS1737
ERR_NamedArgumentSpecificationBeforeFixedArgument	CS1738
ERR_BadNamedArgument	CS1739
ERR_DuplicateNamedArgument	CS1740
ERR_RefOutDefaultValue	CS1741
ERR_NamedArgumentForArray	CS1742
ERR_DefaultValueForExtensionParameter	CS1743
ERR_NamedArgumentUsedInPositional	CS1744
ERR_DefaultValueUsedWithAttributes	CS1745
ERR_BadNamedArgumentForDelegateInvoke	CS1746
ERR_NoPIAAssemblyMissingAttribute	CS1747
ERR_NoCanonicalView	CS1748
ERR_NoConversionForDefaultParam	CS1750
ERR_DefaultValueForParamsParameter	CS1751
ERR_NewCoClassOnLink	CS1752
ERR_NoPIANestedType	CS1754
ERR_InteropTypeMissingAttribute	CS1756
ERR_InteropStructContainsMethods	CS1757
ERR_InteropTypesWithSameNameAndGuid	CS1758
ERR_NoPIAAssemblyMissingAttributes	CS1759
ERR_AssemblySpecifiedForLinkAndRef	CS1760
ERR_LocalTypeNameClash	CS1761
ERR_NotNullRefDefaultParameter	CS1763
ERR_FixedLocalInLambda	CS1764
ERR_MissingMethodOnSourceInterface	CS1766
ERR_MissingSourceInterface	CS1767
ERR_GenericsUsedInNoPIAType	CS1768
ERR_GenericsUsedAcrossAssemblies	CS1769
ERR_NoConversionForNubDefaultParam	CS1770
ERR_InvalidSubsystemVersion	CS1773
ERR_InteropMethodWithBody	CS1774
ERR_BadWarningLevel	CS1900
ERR_BadDebugType	CS1902
ERR_BadResourceVis	CS1906
ERR_DefaultValueTypeMustMatch	CS1908
ERR_DefaultValueBadValueType	CS1910
ERR_MemberAlreadyInitialized	CS1912
ERR_MemberCannotBeInitialized	CS1913
ERR_StaticMemberInObjectInitializer	CS1914
ERR_ReadonlyValueTypeInObjectInitializer	CS1917
ERR_ValueTypePropertyInObjectInitializer	CS1918
ERR_UnsafeTypeInObjectCreation	CS1919
ERR_EmptyElementInitializer	CS1920
ERR_InitializerAddHasWrongSignature	CS1921
ERR_CollectionInitRequiresIEnumerable	CS1922
ERR_CantOpenWin32Manifest	CS1926
ERR_BadInstanceArgType	CS1929
ERR_QueryDuplicateRangeVariable	CS1930
ERR_QueryRangeVariableOverrides	CS1931
ERR_QueryRangeVariableAssignedBadValue	CS1932
ERR_QueryNoProviderCastable	CS1934
ERR_QueryNoProviderStandard	CS1935
ERR_QueryNoProvider	CS1936
ERR_QueryOuterKey	CS1937
ERR_QueryInnerKey	CS1938
ERR_QueryOutRefRangeVariable	CS1939
ERR_QueryMultipleProviders	CS1940
ERR_QueryTypeInferenceFailedMulti	CS1941
ERR_QueryTypeInferenceFailed	CS1942
ERR_QueryTypeInferenceFailedSelectMany	CS1943
ERR_ExpressionTreeContainsPointerOp	CS1944
ERR_ExpressionTreeContainsAnonymousMethod	CS1945
ERR_AnonymousMethodToExpressionTree	CS1946
ERR_QueryRangeVariableReadOnly	CS1947
ERR_QueryRangeVariableSameAsTypeParam	CS1948
ERR_TypeVarNotFoundRangeVariable	CS1949
ERR_BadArgTypesForCollectionAdd	CS1950
ERR_ByRefParameterInExpressionTree	CS1951
ERR_VarArgsInExpressionTree	CS1952
ERR_InitializerAddHasParamModifiers	CS1954
ERR_NonInvocableMemberCalled	CS1955
ERR_ObjectOrCollectionInitializerWithDelegateCreation	CS1958
ERR_InvalidConstantDeclarationType	CS1959
ERR_IllegalVarianceSyntax	CS1960
ERR_UnexpectedVariance	CS1961
ERR_BadDynamicTypeof	CS1962
ERR_ExpressionTreeContainsDynamicOperation	CS1963
ERR_BadDynamicConversion	CS1964
ERR_DeriveFromDynamic	CS1965
ERR_DeriveFromConstructedDynamic	CS1966
ERR_DynamicTypeAsBound	CS1967
ERR_ConstructedDynamicTypeAsBound	CS1968
ERR_DynamicRequiredTypesMissing	CS1969
ERR_ExplicitDynamicAttr	CS1970
ERR_NoDynamicPhantomOnBase	CS1971
ERR_NoDynamicPhantomOnBaseIndexer	CS1972
ERR_BadArgTypeDynamicExtension	CS1973
ERR_NoDynamicPhantomOnBaseCtor	CS1975
ERR_BadDynamicMethodArgMemgrp	CS1976
ERR_BadDynamicMethodArgLambda	CS1977
ERR_BadDynamicMethodArg	CS1978
ERR_BadDynamicQuery	CS1979
ERR_DynamicAttributeMissing	CS1980
ERR_BadAsyncReturn	CS1983
ERR_BadAwaitInFinally	CS1984
ERR_BadAwaitInCatch	CS1985
ERR_BadAwaitArg	CS1986
ERR_BadAsyncArgType	CS1988
ERR_BadAsyncExpressionTree	CS1989
ERR_MixingWinRTEventWithRegular	CS1991
ERR_BadAwaitWithoutAsync	CS1992
ERR_BadAsyncLacksBody	CS1994
ERR_BadAwaitInQuery	CS1995
ERR_BadAwaitInLock	CS1996
ERR_TaskRetNoObjectRequired	CS1997
ERR_FileNotFound	CS2001
ERR_NoFileSpec	CS2005
ERR_SwitchNeedsString	CS2006
ERR_BadSwitch	CS2007
ERR_OpenResponseFile	CS2011
ERR_CantOpenFileWrite	CS2012
ERR_BadBaseNumber	CS2013
ERR_BinaryFile	CS2015
ERR_NoMainOnDLL	CS2017
ERR_InvalidFileAlignment	CS2024
ERR_OneAliasPerReference	CS2034
ERR_SwitchNeedsNumber	CS2035
ERR_MissingDebugSwitch	CS2036
ERR_ComRefCallInExpressionTree	CS2037
ERR_InvalidFormatForGuidForOption	CS2039
ERR_MissingGuidForOption	CS2040
ERR_InvalidOutputName	CS2041
ERR_InvalidDebugInformationFormat	CS2042
ERR_LegacyObjectIdSyntax	CS2043
ERR_SourceLinkRequiresPdb	CS2044
ERR_CannotEmbedWithoutPdb	CS2045
ERR_BadAwaitArgIntrinsic	CS4001
ERR_BadAwaitAsIdentifier	CS4003
ERR_AwaitInUnsafeContext	CS4004
ERR_UnsafeAsyncArgType	CS4005
ERR_VarargsAsync	CS4006
ERR_ByRefTypeAndAwait	CS4007
ERR_BadAwaitArgVoidCall	CS4008
ERR_NonTaskMainCantBeAsync	CS4009
ERR_CantConvAsyncAnonFuncReturns	CS4010
ERR_BadAwaiterPattern	CS4011
ERR_BadSpecialByRefLocal	CS4012
ERR_SpecialByRefInLambda	CS4013
ERR_SynchronizedAsyncMethod	CS4015
ERR_BadAsyncReturnExpression	CS4016
ERR_NoConversionForCallerLineNumberParam	CS4017
ERR_NoConversionForCallerFilePathParam	CS4018
ERR_NoConversionForCallerMemberNameParam	CS4019
ERR_BadCallerLineNumberParamWithoutDefaultValue	CS4020
ERR_BadCallerFilePathParamWithoutDefaultValue	CS4021
ERR_BadCallerMemberNameParamWithoutDefaultValue	CS4022
ERR_BadPrefer32OnLib	CS4023
ERR_DoesntImplementAwaitInterface	CS4027
ERR_BadAwaitArg_NeedSystem	CS4028
ERR_CantReturnVoid	CS4029
ERR_SecurityCriticalOrSecuritySafeCriticalOnAsync	CS4030
ERR_SecurityCriticalOrSecuritySafeCriticalOnAsyncInClassOrStruct	CS4031
ERR_BadAwaitWithoutAsyncMethod	CS4032
ERR_BadAwaitWithoutVoidAsyncMethod	CS4033
ERR_BadAwaitWithoutAsyncLambda	CS4034
ERR_NoSuchMemberOrExtensionNeedUsing	CS4036
ERR_NoEntryPoint	CS5001
ERR_UnexpectedAliasedName	CS7000
ERR_UnexpectedGenericName	CS7002
ERR_UnexpectedUnboundGenericName	CS7003
ERR_GlobalStatement	CS7006
ERR_BadUsingType	CS7007
ERR_ReservedAssemblyName	CS7008
ERR_PPReferenceFollowsToken	CS7009
ERR_ExpectedPPFile	CS7010
ERR_ReferenceDirectiveOnlyAllowedInScripts	CS7011
ERR_NameNotInContextPossibleMissingReference	CS7012
ERR_MetadataNameTooLong	CS7013
ERR_AttributesNotAllowed	CS7014
ERR_ExternAliasNotAllowed	CS7015
ERR_ConflictingAliasAndDefinition	CS7016
ERR_GlobalDefinitionOrStatementExpected	CS7017
ERR_ExpectedSingleScript	CS7018
ERR_RecursivelyTypedVariable	CS7019
ERR_YieldNotAllowedInScript	CS7020
ERR_NamespaceNotAllowedInScript	CS7021
ERR_StaticInAsOrIs	CS7023
ERR_InvalidDelegateType	CS7024
ERR_BadVisEventType	CS7025
ERR_GlobalAttributesNotAllowed	CS7026
ERR_PublicKeyFileFailure	CS7027
ERR_PublicKeyContainerFailure	CS7028
ERR_FriendRefSigningMismatch	CS7029
ERR_CannotPassNullForFriendAssembly	CS7030
ERR_SignButNoPrivateKey	CS7032
ERR_InvalidVersionFormat	CS7034
ERR_NoCorrespondingArgument	CS7036
ERR_ModuleEmitFailure	CS7038
ERR_ResourceFileNameNotUnique	CS7041
ERR_DllImportOnGenericMethod	CS7042
ERR_EncUpdateFailedMissingAttribute	CS7043
ERR_ParameterNotValidForType	CS7045
ERR_AttributeParameterRequired1	CS7046
ERR_AttributeParameterRequired2	CS7047
ERR_SecurityAttributeMissingAction	CS7048
ERR_SecurityAttributeInvalidAction	CS7049
ERR_SecurityAttributeInvalidActionAssembly	CS7050
ERR_SecurityAttributeInvalidActionTypeOrMethod	CS7051
ERR_PrincipalPermissionInvalidAction	CS7052
ERR_FeatureNotValidInExpressionTree	CS7053
ERR_MarshalUnmanagedTypeNotValidForFields	CS7054
ERR_MarshalUnmanagedTypeOnlyValidForFields	CS7055
ERR_PermissionSetAttributeInvalidFile	CS7056
ERR_PermissionSetAttributeFileReadError	CS7057
ERR_InvalidVersionFormat2	CS7058
ERR_InvalidAssemblyCultureForExe	CS7059
ERR_DuplicateAttributeInNetModule	CS7061
ERR_CantOpenIcon	CS7064
ERR_ErrorBuildingWin32Resources	CS7065
ERR_IteratorInInteractive	CS7066
ERR_BadAttributeParamDefaultArgument	CS7067
ERR_MissingTypeInSource	CS7068
ERR_MissingTypeInAssembly	CS7069
ERR_SecurityAttributeInvalidTarget	CS7070
ERR_InvalidAssemblyName	CS7071
ERR_NoTypeDefFromModule	CS7079
ERR_InvalidDynamicCondition	CS7083
ERR_WinRtEventPassedByRef	CS7084
ERR_ByRefReturnUnsupported	CS7085
ERR_NetModuleNameMismatch	CS7086
ERR_BadModuleName	CS7087
ERR_BadCompilationOptionValue	CS7088
ERR_BadAppConfigPath	CS7089
ERR_CmdOptionConflictsSource	CS7091
ERR_FixedBufferTooManyDimensions	CS7092
ERR_CantReadConfigFile	CS7093
ERR_BadAwaitInCatchFilter	CS7094
ERR_EncNoPIAReference	CS7096
ERR_LinkedNetmoduleMetadataMustProvideFullPEImage	CS7098
ERR_MetadataReferencesNotSupported	CS7099
ERR_InvalidAssemblyCulture	CS7100
ERR_EncReferenceToAddedMember	CS7101
ERR_MutuallyExclusiveOptions	CS7102
ERR_InvalidDebugInfo	CS7103
ERR_InvalidSignaturePublicKey	CS8003
ERR_ExportedTypeConflictsWithDeclaration	CS8004
ERR_ExportedTypesConflict	CS8005
ERR_ForwardedTypeConflictsWithDeclaration	CS8006
ERR_ForwardedTypesConflict	CS8007
ERR_ForwardedTypeConflictsWithExportedType	CS8008
ERR_AgnosticToMachineModule	CS8010
ERR_ConflictingMachineModule	CS8011
ERR_CryptoHashFailed	CS8013
ERR_MissingNetModuleReference	CS8014
ERR_NetModuleNameMustBeUnique	CS8015
ERR_UnsupportedTransparentIdentifierAccess	CS8016
ERR_ParamDefaultValueDiffersFromAttribute	CS8017
ERR_FeatureNotAvailableInVersion1	CS8022
ERR_FeatureNotAvailableInVersion2	CS8023
ERR_FeatureNotAvailableInVersion3	CS8024
ERR_FeatureNotAvailableInVersion4	CS8025
ERR_FeatureNotAvailableInVersion5	CS8026
ERR_FieldHasMultipleDistinctConstantValues	CS8027
ERR_ComImportWithInitializers	CS8028
ERR_RetNoObjectRequiredLambda	CS8030
ERR_TaskRetNoObjectRequiredLambda	CS8031
ERR_CantReadRulesetFile	CS8035
ERR_BadPdbData	CS8036
ERR_InitializerOnNonAutoProperty	CS8050
ERR_AutoPropertyMustHaveGetAccessor	CS8051
ERR_AutoPropertyInitializerInInterface	CS8052
ERR_EnumsCantContainDefaultConstructor	CS8054
ERR_EncodinglessSyntaxTree	CS8055
ERR_BlockBodyAndExpressionBody	CS8057
ERR_FeatureNotAvailableInVersion6	CS8059
ERR_SwitchFallOut	CS8070
ERR_NullPropagatingOpInExpressionTree	CS8072
ERR_DictionaryInitializerInExpressionTree	CS8074
ERR_ExtensionCollectionElementInitializerInExpressionTree	CS8075
ERR_UnclosedExpressionHole	CS8076
ERR_SingleLineCommentInExpressionHole	CS8077
ERR_InsufficientStack	CS8078
ERR_UseDefViolationProperty	CS8079
ERR_AutoPropertyMustOverrideSet	CS8080
ERR_ExpressionHasNoName	CS8081
ERR_SubexpressionNotInNameof	CS8082
ERR_AliasQualifiedNameNotAnExpression	CS8083
ERR_NameofMethodGroupWithTypeParameters	CS8084
ERR_NoAliasHere	CS8085
ERR_UnescapedCurly	CS8086
ERR_EscapedCurly	CS8087
ERR_TrailingWhitespaceInFormatSpecifier	CS8088
ERR_EmptyFormatSpecifier	CS8089
ERR_ErrorInReferencedAssembly	CS8090
ERR_ExternHasConstructorInitializer	CS8091
ERR_ExpressionOrDeclarationExpected	CS8092
ERR_NameofExtensionMethod	CS8093
ERR_ConstantStringTooLong	CS8095
ERR_DebugEntryPointNotSourceMethodDefinition	CS8096
ERR_LoadDirectiveOnlyAllowedInScripts	CS8097
ERR_PPLoadFollowsToken	CS8098
ERR_SourceFileReferencesNotSupported	CS8099
ERR_BadAwaitInStaticVariableInitializer	CS8100
ERR_InvalidPathMap	CS8101
ERR_PublicSignButNoKey	CS8102
ERR_TooManyUserStrings	CS8103
ERR_PeWritingFailure	CS8104
ERR_OptionMustBeAbsolutePath	CS8106
ERR_FeatureNotAvailableInVersion7	CS8107
ERR_DynamicLocalFunctionParamsParameter	CS8108
ERR_ExpressionTreeContainsLocalFunction	CS8110
ERR_InvalidInstrumentationKind	CS8111
ERR_LocalFunctionMissingBody	CS8112
ERR_ThrowMisplaced	CS8115
ERR_PatternNullableType	CS8116
ERR_BadIsPatternExpression	CS8117
ERR_SwitchExpressionValueExpected	CS8119
ERR_PatternIsSubsumed	CS8120
ERR_PatternWrongType	CS8121
ERR_ExpressionTreeContainsIsMatch	CS8122
ERR_TupleTooFewElements	CS8124
ERR_TupleReservedElementName	CS8125
ERR_TupleReservedElementNameAnyPosition	CS8126
ERR_TupleDuplicateElementName	CS8127
ERR_PredefinedTypeMemberNotFoundInAssembly	CS8128
ERR_MissingDeconstruct	CS8129
ERR_TypeInferenceFailedForImplicitlyTypedDeconstructionVariable	CS8130
ERR_DeconstructRequiresExpression	CS8131
ERR_DeconstructWrongCardinality	CS8132
ERR_CannotDeconstructDynamic	CS8133
ERR_DeconstructTooFewElements	CS8134
ERR_ConversionNotTupleCompatible	CS8135
ERR_DeconstructionVarFormDisallowsSpecificType	CS8136
ERR_TupleElementNamesAttributeMissing	CS8137
ERR_ExplicitTupleElementNamesAttribute	CS8138
ERR_CantChangeTupleNamesOnOverride	CS8139
ERR_DuplicateInterfaceWithTupleNamesInBaseList	CS8140
ERR_ImplBadTupleNames	CS8141
ERR_PartialMethodInconsistentTupleNames	CS8142
ERR_ExpressionTreeContainsTupleLiteral	CS8143
ERR_ExpressionTreeContainsTupleConversion	CS8144
ERR_AutoPropertyCannotBeRefReturning	CS8145
ERR_RefPropertyMustHaveGetAccessor	CS8146
ERR_RefPropertyCannotHaveSetAccessor	CS8147
ERR_CantChangeRefReturnOnOverride	CS8148
ERR_MustNotHaveRefReturn	CS8149
ERR_MustHaveRefReturn	CS8150
ERR_RefReturnMustHaveIdentityConversion	CS8151
ERR_CloseUnimplementedInterfaceMemberWrongRefReturn	CS8152
ERR_RefReturningCallInExpressionTree	CS8153
ERR_BadIteratorReturnRef	CS8154
ERR_BadRefReturnExpressionTree	CS8155
ERR_RefReturnLvalueExpected	CS8156
ERR_RefReturnNonreturnableLocal	CS8157
ERR_RefReturnNonreturnableLocal2	CS8158
ERR_RefReturnRangeVariable	CS8159
ERR_RefReturnReadonly	CS8160
ERR_RefReturnReadonlyStatic	CS8161
ERR_RefReturnReadonly2	CS8162
ERR_RefReturnReadonlyStatic2	CS8163
ERR_RefReturnParameter	CS8166
ERR_RefReturnParameter2	CS8167
ERR_RefReturnLocal	CS8168
ERR_RefReturnLocal2	CS8169
ERR_RefReturnStructThis	CS8170
ERR_InitializeByValueVariableWithReference	CS8171
ERR_InitializeByReferenceVariableWithValue	CS8172
ERR_RefAssignmentMustHaveIdentityConversion	CS8173
ERR_ByReferenceVariableMustBeInitialized	CS8174
ERR_AnonDelegateCantUseLocal	CS8175
ERR_BadIteratorLocalType	CS8176
ERR_BadAsyncLocalType	CS8177
ERR_RefReturningCallAndAwait	CS8178
ERR_PredefinedValueTupleTypeNotFound	CS8179
ERR_SemiOrLBraceOrArrowExpected	CS8180
ERR_NewWithTupleTypeSyntax	CS8181
ERR_PredefinedValueTupleTypeMustBeStruct	CS8182
ERR_DiscardTypeInferenceFailed	CS8183
ERR_MixedDeconstructionUnsupported	CS8184
ERR_DeclarationExpressionNotPermitted	CS8185
ERR_MustDeclareForeachIteration	CS8186
ERR_TupleElementNamesInDeconstruction	CS8187
ERR_ExpressionTreeContainsThrowExpression	CS8188
ERR_DelegateRefMismatch	CS8189
ERR_BadSourceCodeKind	CS8190
ERR_BadDocumentationMode	CS8191
ERR_BadLanguageVersion	CS8192
ERR_ImplicitlyTypedOutVariableUsedInTheSameArgumentList	CS8196
ERR_TypeInferenceFailedForImplicitlyTypedOutVariable	CS8197
ERR_ExpressionTreeContainsOutVariable	CS8198
ERR_VarInvocationLvalueReserved	CS8199
ERR_ExpressionVariableInConstructorOrFieldInitializer	CS8200
ERR_ExpressionVariableInQueryClause	CS8201
ERR_PublicSignNetModule	CS8202
ERR_BadAssemblyName	CS8203
ERR_BadAsyncMethodBuilderTaskProperty	CS8204
ERR_AttributesInLocalFuncDecl	CS8205
ERR_TypeForwardedToMultipleAssemblies	CS8206
ERR_ExpressionTreeContainsDiscard	CS8207
ERR_PatternDynamicType	CS8208
ERR_VoidAssignment	CS8209
ERR_VoidInTuple	CS8210
ERR_Merge_conflict_marker_encountered	CS8300
ERR_InvalidPreprocessingSymbol	CS8301
ERR_FeatureNotAvailableInVersion7_1	CS8302
ERR_LanguageVersionCannotHaveLeadingZeroes	CS8303
ERR_CompilerAndLanguageVersion	CS8304
ERR_TupleInferredNamesNotAvailable	CS8306
ERR_TypelessTupleInAs	CS8307
ERR_NoRefOutWhenRefOnly	CS8308
ERR_NoNetModuleOutputWhenRefOutOrRefOnly	CS8309
ERR_BadOpOnNullOrDefault	CS8310
ERR_BadDynamicMethodArgDefaultLiteral	CS8311
ERR_DefaultLiteralNotValid	CS8312
ERR_DefaultInSwitch	CS8313
ERR_PatternWrongGenericTypeInVersion	CS8314
ERR_AmbigBinaryOpsOnDefault	CS8315
ERR_FeatureNotAvailableInVersion7_2	CS8320
ERR_DynamicLocalFunctionTypeParameter	CS8322
ERR_BadNonTrailingNamedArgument	CS8323
ERR_NamedArgumentSpecificationBeforeFixedArgumentInDynamicInvocation	CS8324
ERR_RefConditionalAndAwait	CS8325
ERR_RefConditionalNeedsTwoRefs	CS8326
ERR_RefConditionalDifferentTypes	CS8327
ERR_BadParameterModifiers	CS8328
ERR_RefReadonlyNotField	CS8329
ERR_RefReadonlyNotField2	CS8330
ERR_AssignReadonlyNotField	CS8331
ERR_AssignReadonlyNotField2	CS8332
ERR_RefReturnReadonlyNotField	CS8333
ERR_RefReturnReadonlyNotField2	CS8334
ERR_ExplicitReservedAttr	CS8335
ERR_TypeReserved	CS8336
ERR_RefExtensionMustBeValueTypeOrConstrainedToOne	CS8337
ERR_InExtensionMustBeValueType	CS8338
ERR_BadParameterModifiersOrder	CS8339
ERR_FieldsInRoStruct	CS8340
ERR_AutoPropsInRoStruct	CS8341
ERR_FieldlikeEventsInRoStruct	CS8342
ERR_RefStructInterfaceImpl	CS8343
ERR_BadSpecialByRefIterator	CS8344
ERR_FieldAutoPropCantBeByRefLike	CS8345
ERR_StackAllocConversionNotPossible	CS8346
ERR_EscapeCall	CS8347
ERR_EscapeCall2	CS8348
ERR_EscapeOther	CS8349
ERR_CallArgMixing	CS8350
ERR_MismatchedRefEscapeInTernary	CS8351
ERR_EscapeLocal	CS8352
ERR_EscapeStackAlloc	CS8353
ERR_RefReturnThis	CS8354
ERR_OutAttrOnInParam	CS8355
ERR_PredefinedValueTupleTypeAmbiguous3	CS8356
ERR_InvalidVersionFormatDeterministic	CS8357
ERR_AttributeCtorInParameter	CS8358
ERR_ConditionalInInterpolation	CS8361
ERR_CantUseVoidInArglist	CS8362
ERR_DefaultInPattern	CS8363

Warnings

Name	ID	Code Fix (issue or status)
WRN_DeprecatedSymbolStr	CS0618
WRN_SameFullNameThisAggAgg	CS0436
WRN_UnobservedAwaitableExpression	CS4014
WRN_UnassignedInternalField	CS0649
WRN_MissingXMLComment	CS1591
WRN_UnifyReferenceMajMin	CS1701
WRN_UnreachableCode	CS0162
WRN_ALinkWarn	CS1607
WRN_AsyncLacksAwaits	CS1998
WRN_NewRequired	CS0108
WRN_NoSources	CS2008
WRN_UnreferencedVarAssg	CS0219
WRN_UnreferencedVar	CS0168
WRN_UnreferencedField	CS0169
WRN_UnreferencedFieldAssg	CS0414
WRN_UnifyReferenceBldRev	CS1702
WRN_BitwiseOrSignExtend	CS0675
WRN_MultiplePredefTypes	CS1685
WRN_NubExprIsConstBool	CS0472
WRN_NewOrOverrideExpected	CS0114
WRN_UnreferencedEvent	CS0067
WRN_DeprecatedSymbol	CS0612
WRN_CLS_ArrayArgumentToAttribute	CS3016
WRN_CLS_BadFieldPropType	CS3003
WRN_EqualsWithoutGetHashCode	CS0659
WRN_TypeParameterSameAsOuterTypeParameter	CS0693
WRN_ReferencedAssemblyReferencesLinkedPIA	CS1762
WRN_FileAlreadyIncluded	CS2002
WRN_XMLParseError	CS1570
WRN_PossibleMistakenNullStatement	CS0642
WRN_CLS_BadArgType	CS3001
WRN_NewNotRequired	CS0109
WRN_InvalidVersionFormat	CS7035
WRN_CLS_NoVarArgs	CS3000
WRN_CLS_BadReturnType	CS3002
WRN_ConflictingMachineAssembly	CS8012
WRN_AnalyzerCannotBeCreated	CS8032
WRN_UnprocessedXMLComment	CS1587
WRN_CLS_BadIdentifier	CS3008
WRN_CLS_BadBase	CS3009
WRN_ReferencedAssemblyDoesNotHaveStrongName	CS8002
WRN_DuplicateUsing	CS0105
WRN_BadXMLRef	CS1574
WRN_CLS_AssemblyNotCLS2	CS3021
WRN_ProtectedInSealed	CS0628
WRN_NonObsoleteOverridingObsolete	CS0672
WRN_WarningDirective	CS1030
WRN_ErrorOverride	CS1658
WRN_CallOnNonAgileField	CS1690
WRN_EqualityOpWithoutEquals	CS0660
WRN_BadXMLRefSyntax	CS1584
WRN_ConflictingChecksum	CS1697
WRN_DotOnDefault	CS1720
WRN_BadRefCompareLeft	CS0252
WRN_AssignmentToSelf	CS1717
WRN_InvalidMainSig	CS0028
WRN_IsAlwaysFalse	CS0184
WRN_BadRefCompareRight	CS0253
WRN_AlwaysNull	CS0458
WRN_ObsoleteOverridingNonObsolete	CS0809
WRN_UnmatchedParamTag	CS1572
WRN_ComparisonToSelf	CS1718
WRN_CLS_BadIdentifierCase	CS3005
WRN_EqualityOpWithoutGetHashCode	CS0661
WRN_InvalidSearchPathDir	CS1668
WRN_DynamicDispatchToConditionalMethod	CS1974
WRN_BadUILang	CS2038
WRN_CallerMemberNameParamForUnconsumedLocation	CS4026
WRN_NoRuntimeMetadataVersion	CS8021
WRN_UnableToLoadAnalyzer	CS8034
WRN_ByRefNonAgileField	CS0197
WRN_SameFullNameThisAggNs	CS0437
WRN_AssignmentToLockOrDispose	CS0728
WRN_InvalidAssemblyName	CS1700
WRN_UnmatchedParamRefTag	CS1734
WRN_UnmatchedTypeParamRefTag	CS1735
WRN_CLS_OverloadRefOut	CS3006
WRN_CLS_AssemblyNotCLS	CS3014
WRN_SameFullNameThisNsAgg	CS0435
WRN_CmpAlwaysFalse	CS0464
WRN_IncorrectBooleanAssg	CS0665
WRN_DefaultValueForUnconsumedLocation	CS1066
WRN_EmptySwitch	CS1522
WRN_MissingParamTag	CS1573
WRN_BadXMLRefTypeVar	CS1723
WRN_CLS_BadInterface	CS3027
WRN_UnimplementedCommandLineSwitch	CS8001
WRN_NubExprIsConstBool2	CS8073
WRN_UnreferencedLabel	CS0164
WRN_IsAlwaysTrue	CS0183
WRN_AmbiguousXMLReference	CS0419
WRN_FinalizeMethod	CS0465
WRN_DeprecatedCollectionInitAdd	CS1064
WRN_CLS_BadTypeVar	CS3024
WRN_CLS_VolatileField	CS3026
WRN_PatternStaticOrInaccessible	CS0279
WRN_MainCantBeGeneric	CS0402
WRN_ExternMethodNoImplementation	CS0626
WRN_AttributeLocationOnBadDeclaration	CS0657
WRN_InvalidAttributeLocation	CS0658
WRN_UnreachableGeneralCatch	CS1058
WRN_DuplicateParamTag	CS1571
WRN_BadXMLRefParamType	CS1580
WRN_InvalidInclude	CS1590
WRN_InvalidNumber	CS1692
WRN_CLS_NoAbstractMembers	CS3011
WRN_CLS_ModuleMissingCLS	CS3013
WRN_CLS_NotOnModules2	CS3017
WRN_PdbLocalNameTooLong	CS8029
WRN_LowercaseEllSuffix	CS0078
WRN_PatternIsAmbiguous	CS0278
WRN_SequentialOnPartialClass	CS0282
WRN_VolatileByRef	CS0420
WRN_GlobalAliasDefn	CS0440
WRN_GotoCaseShouldConvert	CS0469
WRN_VacuousIntegralComp	CS0652
WRN_DebugFullNameTooLong	CS0811
WRN_BadXMLRefReturnType	CS1581
WRN_XMLParseIncludeError	CS1592
WRN_CmdOptionConflictsSource	CS1616
WRN_IllegalPragma	CS1633
WRN_BadRestoreNumber	CS1635
WRN_IllegalPPChecksum	CS1695
WRN_CantHaveManifestForModule	CS1927
WRN_MultipleRuntimeImplementationMatches	CS1956
WRN_IsDynamicIsConfusing	CS1981
WRN_DefineIdentifierRequired	CS2029
WRN_CLS_BadAttributeType	CS3015
WRN_CLS_MeaninglessOnPrivateType	CS3019
WRN_CallerLineNumberParamForUnconsumedLocation	CS4024
WRN_DelaySignButNoKey	CS7033
WRN_AssemblyAttributeFromModuleIsOverridden	CS7090
WRN_RefCultureMismatch	CS8009
WRN_TupleLiteralNameMismatch	CS8123
WRN_NegativeArrayIndex	CS0251
WRN_PatternBadSignature	CS0280
WRN_ExplicitImplCollision	CS0473
WRN_CoClassWithoutComImport	CS0684
WRN_ExternCtorNoImplementation	CS0824
WRN_DeprecatedCollectionInitAddStr	CS1062
WRN_IdentifierOrNumericLiteralExpected	CS1072
WRN_FailedInclude	CS1589
WRN_IllegalPPWarning	CS1634
WRN_NonECMAFeature	CS1645
WRN_TooManyLinesForDebugger	CS1687
WRN_EndOfPPLineExpected	CS1696
WRN_DuplicateTypeParamTag	CS1710
WRN_UnmatchedTypeParamTag	CS1711
WRN_MissingTypeParamTag	CS1712
WRN_MultipleRuntimeOverrideMatches	CS1957
WRN_NoConfigNotOnCommandLine	CS2023
WRN_CLS_OverloadUnnamed	CS3007
WRN_CLS_BadInterfaceMember	CS3010
WRN_CLS_NotOnModules	CS3012
WRN_CLS_IllegalTrueInFalse	CS3018
WRN_CLS_MeaninglessOnParam	CS3022
WRN_CLS_MeaninglessOnReturn	CS3023
WRN_CallerFilePathParamForUnconsumedLocation	CS4025
WRN_MainIgnored	CS7022
WRN_CallerFilePathPreferredOverCallerMemberName	CS7080
WRN_CallerLineNumberPreferredOverCallerMemberName	CS7081
WRN_CallerLineNumberPreferredOverCallerFilePath	CS7082
WRN_FilterIsConstantTrue	CS7095
WRN_UnqualifiedNestedTypeInCref	CS8018
WRN_NoAnalyzerInAssembly	CS8033
WRN_AlignmentMagnitude	CS8094
WRN_AttributeIgnoredWhenPublicSigning	CS8105
WRN_Experimental	CS8305
WRN_UnreferencedLocalFunction	CS8321
WRN_FilterIsConstantFalse	CS8359
WRN_FilterIsConstantFalseRedundantTryCatch	CS8360

Other

Name	ID	Code Fix (issue or status)
FTL_MetadataCantOpenFile	CS0009
FTL_BadCodepage	CS2016
HDN_UnusedUsingDirective	CS8019
FTL_DebugEmitFailure	CS0041
FTL_InvalidTarget	CS2019
FTL_InputFileNameTooLong	CS2021
FTL_OutputFileExists	CS2033
FTL_BadChecksumAlgorithm	CS3028
HDN_UnusedExternAlias	CS8020
INF_UnableToLoadSomeTypesInAnalyzer	CS8040

[Neme12]

@sharwell That list is very nice, but it's a bit empty. Do you think it would be a good idea to put that somewhere in the Roslyn repo as a markdown file (maybe /docs/ide) so that anyone could contribute to it, either by linking to an issue they created or a code fix?

Perhaps that file could also link to the spreadsheet.

[CyrusNajmabadi]

Closing as speculative.