Unity code inspections

ReSharper's code inspection features are also supported in Unity-specific C# code. You can find the detailed information on these features in the corresponding topics of the Find code issues with code inspection section.

Examples of code inspections and quick-fixes

ReSharper shows warnings for unknown scenes, tags, and layers.
When the Solution-wide analysis is enabled, ReSharper understands implicitly used fields and event functions and do not highlight them as not accessed.
Empty event functions are shown as dead code, with a quick-fix to remove them.
Using the SyncVarAttribute inside any class other than NetworkBehaviour is treated as an error.
A quick-fix is suggested to create a serialized field from a usage of an unresolved symbol:
ReSharper ensures that all of your event functions have correct signatures: it highlights incorrect signatures and offers a quick-fix to correct them:
ReSharper warns you against using an inefficient string literal comparison with the tag property, and provides a quick-fix to rewrite this as a call to CompareTag.
ReSharper warns you if you try to use the new keyword to create a new instance of a class deriving from MonoBehaviour or ScriptableObject. A quick-fix is suggested to use gameObject.AddComponent<T>() or ScriptableObject.CreateInstance<T>() instead.
There are also inspections for the [InitializeOnLoad] and [InitializeOnLoadMethod] attributes, ensuring that they have the correct method or constructor signatures, and ReSharper will grey out a redundant [InitializeOnLoad] attribute if the class doesn't have a static constructor, with a quick-fix to either quickly remove the attribute, or create the constructor.

List of Unity-specific code inspections

Unity (47 inspections)

Inspections in this category report code issues specific to Unity projects.

Inspection ID EditorConfig property	Default severity
Alternative non-allocating method available `Unity.PreferNonAllocApi` `resharper_unity_prefer_non_alloc_api_highlighting`	Warning
Avoid 'base.OnGUI()' in classes derived from 'PropertyDrawer' `Unity.PropertyDrawerOnGUIBase` `resharper_unity_property_drawer_on_gui_base_highlighting`	Warning
Cannot resolve component or scriptable object `Unity.UnresolvedComponentOrScriptableObject` `resharper_unity_unresolved_component_or_scriptable_object_highlighting`	Warning
DOTS: IAspect fields are required to be one of the following types: RefRW, RefRO, EnabledRefRW, EnabledRefRO, DynamicBuffer, or Entity `Unity.Entities.AspectWrongFieldsType` `resharper_unity_entities_aspect_wrong_fields_type_highlighting`	Error
DOTS: Inconsistent type keywords `Unity.Entities.InconsistentModifiersForDotsInheritor` `resharper_unity_entities_inconsistent_modifiers_for_dots_inheritor_highlighting`	Error
DOTS: The type specified must be a structure type `Unity.Entities.MustBeStructForDotsInheritor` `resharper_unity_entities_must_be_struct_for_dots_inheritor_highlighting`	Error
Event function with the same name is already declared `Unity.DuplicateEventFunction` `resharper_unity_duplicate_event_function_highlighting`	Warning
Expected a type derived from 'Component' or 'MonoBehaviour' `Unity.ExpectedComponent` `resharper_unity_expected_component_highlighting`	Warning
Expected a type derived from 'ScriptableObject' `Unity.ExpectedScriptableObject` `resharper_unity_expected_scriptable_object_highlighting`	Warning
Field of 'ComponentLookup' type must be updated before being used. `Unity.Entities.NotUpdatedComponentLookup` `resharper_unity_entities_not_updated_component_lookup_highlighting`	Warning
File name should match the name of the assembly `MISMATCHED_ASMDEF_FILENAME` `resharper_mismatched_asmdef_filename_highlighting`	Suggestion
Group path is not defined `Odin.OdinUnknownGroupingPath` `resharper_odin_odin_unknown_grouping_path_highlighting`	Warning
Incorrect method signature `Unity.IncorrectMethodSignature` `resharper_unity_incorrect_method_signature_highlighting`	Warning
Incorrect Odin's group attribute type `Odin.OdinMemberWrongGroupingAttribute` `resharper_odin_odin_member_wrong_grouping_attribute_highlighting`	Warning
Member appears in multiple UI groups simultaneously `Odin.OdinMemberPresentInMultipleGroups` `resharper_odin_odin_member_present_in_multiple_groups_highlighting`	Warning
Method referenced in string literal does not have the expected signature `Unity.IncorrectMethodSignatureInStringLiteral` `resharper_unity_incorrect_method_signature_in_string_literal_highlighting`	Warning
'MonoBehaviour' instances must be instantiated with 'GameObject.AddComponent<T>()' instead of 'new' `Unity.IncorrectMonoBehaviourInstantiation` `resharper_unity_incorrect_mono_behaviour_instantiation_highlighting`	Warning
Parameter should be derived from 'Component' `Unity.ParameterNotDerivedFromComponent` `resharper_unity_parameter_not_derived_from_component_highlighting`	Warning
Possible incorrect application of attribute to multiple fields `Unity.PossibleMisapplicationOfAttributeToMultipleFields` `resharper_unity_possible_misapplication_of_attribute_to_multiple_fields_highlighting`	Warning
Possible unintended bypass of lifetime check of underlying Unity engine object (null coalescing on a type deriving from 'UnityEngine.Object' bypasses the lifetime check on the underlying Unity engine object) `Unity.NoNullCoalescing` `resharper_unity_no_null_coalescing_highlighting`	Disabled
Possible unintended bypass of lifetime check of underlying Unity engine object (null propagating on a type deriving from 'UnityEngine.Object' bypasses the lifetime check on the underlying Unity engine object) `Unity.NoNullPropagation` `resharper_unity_no_null_propagation_highlighting`	Disabled
Possible unintended bypass of lifetime check of underlying Unity engine object (pattern matching null checks on a type deriving from 'UnityEngine.Object' bypasses the lifetime check on the underlying Unity engine object) `Unity.NoNullPatternMatching` `resharper_unity_no_null_pattern_matching_highlighting`	Disabled
Prefer GUID-based assembly references `Unity.PreferGuidReference` `resharper_unity_prefer_guid_reference_highlighting`	Hint
Redundant attribute usage (attribute is redundant when applied to this declaration type) `Unity.RedundantAttributeOnTarget` `resharper_unity_redundant_attribute_on_target_highlighting`	Warning
Redundant attribute usage (redundant 'FormerlySerializedAs' attribute) `Unity.RedundantFormerlySerializedAsAttribute` `resharper_unity_redundant_formerly_serialized_as_attribute_highlighting`	Warning
Redundant attribute usage (redundant 'HideInInspector' attribute) `Unity.RedundantHideInInspectorAttribute` `resharper_unity_redundant_hide_in_inspector_attribute_highlighting`	Warning
Redundant attribute usage (redundant 'InitializeOnLoad' attribute) `Unity.RedundantInitializeOnLoadAttribute` `resharper_unity_redundant_initialize_on_load_attribute_highlighting`	Warning
Redundant attribute usage (redundant 'SerializeField' attribute) `Unity.RedundantSerializeFieldAttribute` `resharper_unity_redundant_serialize_field_attribute_highlighting`	Warning
Redundant Unity event function `Unity.RedundantEventFunction` `resharper_unity_redundant_event_function_highlighting`	Warning
Repeated access of property on built in component is inefficient `Unity.InefficientPropertyAccess` `resharper_unity_inefficient_property_access_highlighting`	Disabled
Scene does not exist `Unity.LoadSceneUnexistingScene` `resharper_unity_load_scene_unexisting_scene_highlighting`	Warning
Scene is disabled in the build settings `Unity.LoadSceneDisabledSceneName` `resharper_unity_load_scene_disabled_scene_name_highlighting`	Warning
'ScriptableObject' instances must be instantiated with 'ScriptableObject.CreateInstance<T>()' instead of 'new' `Unity.IncorrectScriptableObjectInstantiation` `resharper_unity_incorrect_scriptable_object_instantiation_highlighting`	Warning
Setting 'parent' property immediately after object instantiation is inefficient `Unity.InstantiateWithoutParent` `resharper_unity_instantiate_without_parent_highlighting`	Warning
Short scene name is not unique `Unity.LoadSceneAmbiguousSceneName` `resharper_unity_load_scene_ambiguous_scene_name_highlighting`	Warning
String based graphics property lookup is inefficient `Unity.PreferAddressByIdToGraphicsParams` `resharper_unity_prefer_address_by_id_to_graphics_params_highlighting`	Warning
String based lookup of component type is inefficient `Unity.PreferGenericMethodOverload` `resharper_unity_prefer_generic_method_overload_highlighting`	Warning
The index is missing in the build settings `Unity.LoadSceneWrongIndex` `resharper_unity_load_scene_wrong_index_highlighting`	Warning
The input name is not defined in the Input manager `Unity.UnknownInputAxes` `resharper_unity_unknown_input_axes_highlighting`	Warning
The layer is not defined in the 'Tags & Layers' `Unity.UnknownLayer` `resharper_unity_unknown_layer_highlighting`	Warning
The resource is not defined in the project `Unity.UnknownResource` `resharper_unity_unknown_resource_highlighting`	Warning
The same shortcut is defined for another menu item `Unity.DuplicateShortcut` `resharper_unity_duplicate_shortcut_highlighting`	Warning
The tag is not defined in the 'Tags & Layers' `Unity.UnknownTag` `resharper_unity_unknown_tag_highlighting`	Warning
There is no animator state with the same name in the project. `Unity.UnknownAnimatorStateName` `resharper_unity_unknown_animator_state_name_highlighting`	Warning
There is no scene with the same name in the build settings `Unity.LoadSceneUnknownSceneName` `resharper_unity_load_scene_unknown_scene_name_highlighting`	Warning
To use the result of a 'GetSingleton' call in the function, 'OnCreate' must include a 'RequireForUpdate' call `Unity.Entities.SingletonMustBeRequested` `resharper_unity_entities_singleton_must_be_requested_highlighting`	Warning
Use 'CompareTag' instead of explicit string comparison `Unity.ExplicitTagComparison` `resharper_unity_explicit_tag_comparison_highlighting`	Warning

Unity Burst Compiler Warnings (17 inspections)

Inspections in this category report warnings of the Unity Burst Compiler before the code is actually compiled.

Inspection ID EditorConfig property	Default severity
Accessing managed indexers is not supported `Unity.BurstAccessingManagedIndexer` `resharper_unity_burst_accessing_managed_indexer_highlighting`	Warning
Accessing managed methods is not supported `Unity.BurstAccessingManagedMethod` `resharper_unity_burst_accessing_managed_method_highlighting`	Warning
Boxing is not supported `Unity.BurstBoxingNotSupported` `resharper_unity_burst_boxing_not_supported_highlighting`	Warning
Burst: String.Format(format, ...) invalid argument type `Unity.BurstStringFormatInvalidArgument` `resharper_unity_burst_string_format_invalid_argument_highlighting`	Warning
Burst: The variable resolves to System.String, which may result in invalid managed method calls at the Burst-compiled call stack `Unity.BurstLocalStringVariableDeclaration` `resharper_unity_burst_local_string_variable_declaration_highlighting`	Suggestion
Creating a managed type is not supported `Unity.BurstCreatingManagedType` `resharper_unity_burst_creating_managed_type_highlighting`	Warning
Debug logging functions only accept strings `Unity.BurstDebugLogInvalidArgument` `resharper_unity_burst_debug_log_invalid_argument_highlighting`	Warning
Function signature cannot contain managed types `Unity.BurstFunctionSignatureContainsManagedTypes` `resharper_unity_burst_function_signature_contains_managed_types_highlighting`	Warning
Loading from a non-readonly static field is not supported `Unity.BurstLoadingStaticNotReadonly` `resharper_unity_burst_loading_static_not_readonly_highlighting`	Warning
Loading managed type is not supported `Unity.BurstLoadingManagedType` `resharper_unity_burst_loading_managed_type_highlighting`	Warning
Shared static type parameter requires the unmanaged constraint `Unity.SharedStaticUnmanagedType` `resharper_unity_shared_static_unmanaged_type_highlighting`	Warning
Some SharedStatic`1.GetOrCreate overloads cause compiler errors `Unity.BurstSharedStaticCreate` `resharper_unity_burst_shared_static_create_highlighting`	Warning
String.Format(format, ...) only accepts string literals and const strings `Unity.BurstStringFormatInvalidFormat` `resharper_unity_burst_string_format_invalid_format_highlighting`	Warning
The 'foreach' construction is not supported `Unity.BurstForeachNotSupported` `resharper_unity_burst_foreach_not_supported_highlighting`	Warning
Try statement is not supported `Unity.BurstTryNotSupported` `resharper_unity_burst_try_not_supported_highlighting`	Warning
Typeof is prohibited in Burst `Unity.BurstTypeofExpression` `resharper_unity_burst_typeof_expression_highlighting`	Warning
Writing to a static field is not supported `Unity.BurstWriteStaticField` `resharper_unity_burst_write_static_field_highlighting`	Warning

Unity Performance Inspections (5 inspections)

Inspections in this category report computationally inefficient patterns Unity projects.

Inspection ID EditorConfig property	Default severity
'Camera.main' is expensive `Unity.PerformanceCriticalCodeCameraMain` `resharper_unity_performance_critical_code_camera_main_highlighting`	Hint
Expensive method invocation `Unity.PerformanceCriticalCodeInvocation` `resharper_unity_performance_critical_code_invocation_highlighting`	Hint
Expensive null comparison `Unity.PerformanceCriticalCodeNullComparison` `resharper_unity_performance_critical_code_null_comparison_highlighting`	Hint
Order of multiplication operations is inefficient `Unity.InefficientMultiplicationOrder` `resharper_unity_inefficient_multiplication_order_highlighting`	Warning
Use jagged or one-dimensional array instead of multidimensional array `Unity.InefficientMultidimensionalArrayUsage` `resharper_unity_inefficient_multidimensional_array_usage_highlighting`	Warning

27 March 2026