JetBrains Rider 2025.1 Help

Code Inspections in ASP.NET

In ASP.NET, JetBrains Rider 2025.1 provides two kinds of code inspections: 6 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 39 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 ASP.NET inspections are listed below, grouped by their categories.

Common Practices and Code Improvements (1 inspection)

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

Inspection
ID
EditorConfig property

Default severity

Attribute with optional value problem


Asp.TagAttributeWithOptionalValue
resharper_asp_tag_attribute_with_optional_value_highlighting

Warning

Grammar Issues (4 inspections)

Inspections in this category report grammar issues in string literals and documentation comments.

Inspection
ID
EditorConfig property

Default severity

Grammar error in comment


GrammarMistakeInComment
resharper_grammar_mistake_in_comment_highlighting

Suggestion

Grammar error in markup attribute value


GrammarMistakeInMarkupAttribute
resharper_grammar_mistake_in_markup_attribute_highlighting

Suggestion

Grammar error in markup text


GrammarMistakeInMarkupText
resharper_grammar_mistake_in_markup_text_highlighting

Suggestion

Grammar error in string literal


GrammarMistakeInStringLiteral
resharper_grammar_mistake_in_string_literal_highlighting

Disabled

Potential Code Quality Issues (25 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

ASP.NET Dead Code


Asp.DeadCode
resharper_asp_dead_code_highlighting

Warning

ASP.NET Resolve Warning


Asp.ResolveWarning
resharper_asp_resolve_warning_highlighting

Warning

ASP.NET Warning


Asp.Warning
resharper_asp_warning_highlighting

Warning

Cannot resolve property


PropertyNotResolved
resharper_property_not_resolved_highlighting

Error

Cannot resolve resource


ResourceNotResolved
resharper_resource_not_resolved_highlighting

Error

Cannot resolve resource item


ResourceItemNotResolved
resharper_resource_item_not_resolved_highlighting

Error

Invalid control type


Asp.InvalidControlType
resharper_asp_invalid_control_type_highlighting

Error

MVC (mismatch Model Type)


Mvc.InvalidModelType
resharper_mvc_invalid_model_type_highlighting

Error

MVC (unknown action)


Mvc.ActionNotResolved
resharper_mvc_action_not_resolved_highlighting

Error

MVC (unknown area)


Mvc.AreaNotResolved
resharper_mvc_area_not_resolved_highlighting

Error

MVC (unknown controller)


Mvc.ControllerNotResolved
resharper_mvc_controller_not_resolved_highlighting

Error

MVC (unknown masterpage)


Mvc.MasterpageNotResolved
resharper_mvc_masterpage_not_resolved_highlighting

Error

MVC (unknown partial view)


Mvc.PartialViewNotResolved
resharper_mvc_partial_view_not_resolved_highlighting

Error

MVC (unknown template)


Mvc.TemplateNotResolved
resharper_mvc_template_not_resolved_highlighting

Error

MVC (unknown view component view)


Mvc.ViewComponentViewNotResolved
resharper_mvc_view_component_view_not_resolved_highlighting

Error

MVC (unknown view component)


Mvc.ViewComponentNotResolved
resharper_mvc_view_component_not_resolved_highlighting

Error

MVC (unknown view)


Mvc.ViewNotResolved
resharper_mvc_view_not_resolved_highlighting

Error

Non-accessed field (non-private accessibility)


NotAccessedField.Global
resharper_not_accessed_field_global_highlighting

Suggestion

Object data source method resolve problem


AspOdsMethodReferenceResolveError
resharper_asp_ods_method_reference_resolve_error_highlighting

Error

Unknown content placeholder


Asp.ContentPlaceholderNotResolved
resharper_asp_content_placeholder_not_resolved_highlighting

Error

Unknown skin


Asp.SkinNotResolved
resharper_asp_skin_not_resolved_highlighting

Error

Unknown symbol


Asp.NotResolved
resharper_asp_not_resolved_highlighting

Error

Unknown theme


Asp.ThemeNotResolved
resharper_asp_theme_not_resolved_highlighting

Error

Unsupported pageParserFilterType


Asp.CustomPageParserFilterType
resharper_asp_custom_page_parser_filter_type_highlighting

Warning

Wrong image size


Asp.Image
resharper_asp_image_highlighting

Warning

Redundancies in Code (3 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

Redundant using directive


RedundantUsingDirective
resharper_redundant_using_directive_highlighting

Warning

Unused import clause


UnusedImportClause
resharper_unused_import_clause_highlighting

Warning

Unused register directive


AspUnusedRegisterDirectiveHighlighting
resharper_asp_unused_register_directive_highlighting_highlighting

Warning

Redundancies in Symbol Declarations (1 inspection)

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 member is never used (non-private accessibility)


UnusedMember.Global
resharper_unused_member_global_highlighting

Suggestion

Spelling Issues (5 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

Typo in string literal


StringLiteralTypo
resharper_string_literal_typo_highlighting

Suggestion

31 March 2025