ReSharper 2021.3 Help

Code Inspections in XAML

In XAML, ReSharper 2021.3 provides two kinds of code inspections: 4 inspections that detect errors such as broken syntax, unresolved symbols, compiler errors, and so on (you cannot configure or disable any of these inspections), and 69 proprietary code inspections, any of which you can disable or change its severity level.
These code inspections help you detect code issues in design time in all open files, and additionally they allow you to find code issues in specific scope.

Configurable XAML inspections are listed below, grouped by their categories.

Code Notification (24 inspections)

This category groups code inspections with minor severity levels.

Inspection


ID


EditorConfig property

Default severity

{DynamicResource} can only be used with dependency property


Xaml.DynamicResourceError


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Error

Constructor not resolved


Xaml.ConstructorWarning


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Warning

Decimal numbers parsed depending on current machine culture


Xaml.DecimalParsingIsCultureDependent


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Warning

Dependency property descriptor field missing


Xaml.DependencyPropertyResolveError


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Warning

Element name reference not resolved


Xaml.ElementNameReferenceNotResolved


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Error

Grid columns/rows definitions can be converted to attribute


Xaml.GridDefinitionsCanBeConvertedToAttribute


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Hint

Grid length definition should not be empty


Xaml.EmptyGridLengthDefinition


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Error

Ignored path


Xaml.IgnoredPathHighlighting


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Disabled

Mapped path


Xaml.MappedPathHighlighting


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Hint

Member of invalid type


Xaml.InvalidMemberType


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Error

Method arguments will be replaced by event's arguments in generated code


Xaml.MethodArgumentsWillBeIgnored


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Warning

Multiple overloads with same arguments count found


Xaml.OverloadsCollision


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Warning

Object/markup extension of invalid type


Xaml.InvalidType


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Error

Parent is outside the current component tree


Xaml.ParentIsOutOfCurrentComponentTree


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Warning

Path to resource is case-sensitive


Xaml.ResourceFilePathCaseMismatch


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Warning

Routed event descriptor field missing


Xaml.RoutedEventResolveError


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Warning

Static resource not resolved


Xaml.StaticResourceNotResolved


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Warning

Style class not found


Xaml.StyleClassNotFound


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Warning

Unresolved binding path when DataContext is known


Xaml.BindingWithContextNotResolved


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Warning

Unresolved binding path when DataContext is unknown


Xaml.BindingWithoutContextNotResolved


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Hint

Using stream binding operator in TwoWay or OneWayToSource binding modes


Xaml.AvaloniaWrongBindingModeForStreamBindingOperator


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Warning

x:DataType not specified for CompiledBinding


Xaml.CompiledBindingMissingDataTypeErrorHighlighting


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Error

XAML resource of invalid type


Xaml.InvalidResourceType


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Error

XAML style of invalid target type


Xaml.InvalidResourceTargetType


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Error

Common Practices and Code Improvements (3 inspections)

This category groups inspections that hunt for medium severity issues that mainly affect code readability.

Inspection


ID


EditorConfig property

Default severity

Member can be made private (non-private accessibility)


MemberCanBePrivate.Global


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Suggestion

Member can be made protected (non-private accessibility)


MemberCanBeProtected.Global


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Suggestion

Member or type can be made internal(friend)


MemberCanBeInternal


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Disabled

Compiler Warnings (2 inspections)

Inspections in this category detect compiler warnings before you compile.

Inspection


ID


EditorConfig property

Default severity

Use of obsolete type or type member


ObsoleteElement


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Warning

Use of obsolete type or type member (error)


ObsoleteElementError


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Error

Constraints Violations (2 inspections)

This category includes code inspections, mostly with the warning severity level, which detect violations related to symbol attributes, including ReSharper's code annotations, and other similar issues.

Inspection


ID


EditorConfig property

Default severity

Inconsistent Naming


InconsistentNaming


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Warning

Possible 'null' assignment to non-nullable entity


Xaml.AssignNullToNotNullAttribute


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Warning

Potential Code Quality Issues (17 inspections)

This category includes inspections that detect critical issues (code smells), mostly with Error or Warning level. This category also includes inspections that ensure localization assistance.

Inspection


ID


EditorConfig property

Default severity

DeviceFamily-specific view type name does not match generic type name


Xaml.XamlMismatchedDeviceFamilyViewClrNameHighlighting


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Warning

Duplicate device family view


Xaml.XamlDuplicateDeviceFamilyTypeViewHighlighting


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Error

Duplicate style property/event setter


Xaml.DuplicateStyleSetter


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Warning

Grid element column/row index is out of grid definition range


Xaml.IndexOutOfGridDefinition


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Warning

Missing grid column/row setter for non-first child


Xaml.MissingGridIndex


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Warning

Non-accessed field (non-private accessibility)


NotAccessedField.Global


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Suggestion

Non-accessed field (private accessibility)


NotAccessedField.Local


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Warning

Path error


Xaml.PathError


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Warning

Possible 'null' value in the path of binding without fallback value


Xaml.PossibleNullReferenceException


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Suggestion

RelativeSourceMode is not set explicitly


Xaml.XamlRelativeSourceDefaultModeWarningHighlighting


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Warning

Resource cannot be accessed by class name because of x:Key attribute


Xaml.RedundantXamarinFormsClassDeclaration


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Warning

Style target type is not convertible to base type


Xaml.StyleInvalidTargetType


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Error

Types in x:DataType and BindingContext mismatch


Xaml.XamlXamarinFormsDataTypeAndBindingContextTypeMismatchedHighlighting


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Warning

Unexpected text token error


Xaml.UnexpectedTextToken


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Error

Unknown DeviceFamily


Xaml.XamlUnknownDeviceFamilyTypeHighlighting


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Warning

x:Key is allowed for resources and dictionary elements only


Xaml.XKeyAttributeDisallowed


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Error

XAML language level error


Xaml.LanguageLevel


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Error

Redundancies in Code (13 inspections)

Code inspections in this category look for redundancies and dead code, which affect code readability and style, and could be safely removed. Some code redundancies cannot be fixed automatically, and quick-fixes for them are performed in the interactive mode, requiring the user input. But the majority of the redundancies can be fixed without user interaction, using either fix in scope or code cleanup.

Inspection


ID


EditorConfig property

Default severity

Binding mode is equal to default


Xaml.RedundantBindingModeAttribute


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Warning

Property value is equal to style-provided


Xaml.RedundantStyledValue


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Warning

Redundant empty collection property setter


Xaml.RedundantCollectionProperty


resharper_xaml_redundant_collection_property_highlighting

Warning

Redundant 'Freeze' attribute


Xaml.RedundantFreezeAttribute


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Warning

Redundant modifiers attribute


Xaml.RedundantModifiersAttribute


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Warning

Redundant name attribute


Xaml.RedundantNameAttribute


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Warning

Redundant namespace alias


Xaml.RedundantNamespaceAlias


resharper_xaml_redundant_namespace_alias_highlighting

Warning

Redundant property type qualifier


Xaml.RedundantPropertyTypeQualifier


resharper_xaml_redundant_property_type_qualifier_highlighting

Warning

Redundant resource


Xaml.RedundantResource


resharper_xaml_redundant_resource_highlighting

Warning

Remove redundant attached property setter


Xaml.RedundantAttachedProperty


resharper_xaml_redundant_attached_property_highlighting

Warning

Single grid row/column definition is redundant


Xaml.RedundantGridDefinitions


resharper_xaml_redundant_grid_definitions_highlighting

Warning

Single-cell grid column/row span is redundant


Xaml.RedundantGridSpan


resharper_xaml_redundant_grid_span_highlighting

Warning

UpdateSourceTrigger=Default is redundant


Xaml.RedundantUpdateSourceTriggerAttribute


resharper_xaml_redundant_update_source_trigger_attribute_highlighting

Warning

Redundancies in Symbol Declarations (4 inspections)

This category includes code inspections, mostly with the warning severity level, which detect empty and unused symbol declarations.

Inspection


ID


EditorConfig property

Default severity

Type is never used (non-private accessibility)


UnusedType.Global


resharper_unused_type_global_highlighting

Suggestion

Type is never used (private accessibility)


UnusedType.Local


resharper_unused_type_local_highlighting

Warning

Type member is never used (non-private accessibility)


UnusedMember.Global


resharper_unused_member_global_highlighting

Suggestion

Type member is never used (private accessibility)


UnusedMember.Local


resharper_unused_member_local_highlighting

Warning

Spelling issues (4 inspections)

These inspections detect typos in various contexts.

Inspection


ID


EditorConfig property

Default severity

Typo in comment


CommentTypo


resharper_comment_typo_highlighting

Suggestion

Typo in identifier


IdentifierTypo


resharper_identifier_typo_highlighting

Suggestion

Typo in markup attribute value


MarkupAttributeTypo


resharper_markup_attribute_typo_highlighting

Suggestion

Typo in markup text


MarkupTextTypo


resharper_markup_text_typo_highlighting

Suggestion

Last modified: 05 January 2022