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Michael Damatov edited this page Sep 10, 2025 · 17 revisions

Welcome to the ReCommended-Extension wiki!

C# Analyzers

Redundant assertions

Analyzes assertion statements and highlights them if they can be removed. show more...

Annotations

Analyzes not allowed, missing, or redundant usages of the [NotNull] and [CanBeNull] annotations.
Analyzes not allowed [ItemNotNull] annotations.
Analyzes [SuppressMessage] annotations without justifications.
Analyzes simultaneously used [Pure] and [MustUseReturnValue] annotations.

Exceptions

Analyzes throw statements and highlights exceptions that should never be thrown. show more...
Analyzes catch clauses and highlights exceptions that should never be caught. show more...
Analyzes whether exceptions are thrown in unexpected locations. show more...
Analyzes when the Exception is caught without declaring an exception variable. show more...

`await` expressions

Analyzes whether adding .ConfigureAwait(false) is recommended. show more...

`ValueTask`/`ValueTask<T>` usages

Analyzes whether ValueTask or ValueTask<T> values consumed more than once. show more...
Analyzes whether .GetAwaiter().GetResult() is invoked for a ValueTask or ValueTask<T> show more...

`async void` methods

Analyzes "async void" methods and local functions and highlights when used inappropriately.
Analyzes "async" lambda expressions (and anonymous methods as well) that return void.

Collections

Suggests using collection expressions.
Suggests using Array.Empty<T>() to reuse the immutable instance.
Suggests using new T[n] to improve code readability, where n is the element count. show more...

Base Types and LINQ

Suggests replacing expressions with known results.
Suggests using other methods.
Suggests using indexers or patterns.
Suggests using properties or operators.
Suggests removing redundant arguments.
Suggests removing redundant method invocations.

String Formatters

Suggests removing redundant format specifiers.
Suggests removing redundant format precision specifiers.
Warns about unsupported format specifiers.

Initialization of `ArgumentException` (or descendant) objects

Analyzes whether parameter names are passed where the message argument is expected. show more...

Locks

Analyzes lock statements and warns when objects with weak identities are used. show more...
Analyzes whether yield return statement is used inside lock blocks. show more...

`IEquatable<T>`

Suggests declaring an implementation of IEqualityOperators<T, T, bool> when IEquatable<T> is implemented for the type.
Warns when a struct overrides Equals without implementing the IEquatable<T>.
Warns when a type implements the IEquatable<T> interface without overring Equals.

`IComparable<T>`

Suggests declaring an implementation of IComparisonOperators<T, T, bool> when IComparable<T> is implemented for the type. show more...

Redundant `Invoke` usages

Analyzes whether Invoke can be omitted for delegate types. show more...

Redundant base type declarations

Analyzes whether declaring the base type can be omitted. show more...

Conditional methods and attributes

Dims method invocations if the method has the [Conditional] annotation, e.g. Debug.Assert(...).
Dims attribute usages if the attribute class has the [Conditional] annotation, e.g. [SuppressMessage].

Constructors

Suggests using more appropriate visibility for internal constructors in abstract classes. show more...
Analyzes invocations of methods annotated with the [NotifyPropertyChangedInvocator] from class constructors. show more...

Regions

Analyzes if #region scopes are overused. show more...

C# Context Actions

Declare implementation of

IEqualityOperators<T, T, bool>
IComparisonOperators<T, T, bool>

Set language injection

Puts a C# comment to indicate that the next string literal contains a piece of code written in one of the programming languages supported by ReSharper (e.g. JSON, XML, CSS, HTML, regular expression, etc.) show more...

Add code contract

Suggests adding code contracts for commonly used scenarios. show more...

Annotate with

[NonNegativeValue]
[Pure]
[MustUseReturnValue]
[InstantHandle]
[LinqTunnel]

XML Doc Comments

Embrace with <c>...</c>
Embed into <see cref="..."/>
Embed into <typeparamref name="..."/>
Embed into <paramref name="..."/>
Reflow XML doc comments

Replace async method return type

Task to ValueTask (and vice versa)
Task<T> to ValueTask<T> (and vice versa)

Convert to no-op LINQ query

Converts IEnumerable<T> expressions to no-op LINQ queries. show more...

String context actions

Replace string.IsNullOrEmpty patterns show more...

Remove inline assertion

Suggests to remove the AssertNotNull expression. show more...

XAML Analyzers

Binding expressions

Checks binding expressions without explicitly set Mode. show more...