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C# Analyzers

Redundant null-forgiving operators or assertions

• Analyzes the null-forgiving operators or 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.

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Exceptions

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

await expressions

• Analyzes whether the async/await keywords are redundant. show more...
• 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...

async void methods

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

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Array initializations

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

Initialization of ArgumentException (or descendant) objects

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

Locks

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

Redundant Invoke usages

• Analyzes whether Invoke can be omitted for delegate types. show mode...

Conditional methods and attributes

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

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Constructors

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

Regions

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

C# Context Actions

Set language injection

• Puts the 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]

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Configure the await expression

• Suggests adding .ConfigureAwait(false). 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...