Use 'nameof' (IDE0280)

Property	Value
Rule ID	IDE0280
Title	Use 'nameof'
Category	Style
Subcategory	Language rules (parameter preferences)
Applicable languages	C#

Overview

This rule flags the use of a literal parameter name instead of the nameof expression in attributes such as NotNullIfNotNullAttribute, NotNullWhenAttribute, and CallerArgumentExpressionAttribute that take a parameter name.

Options

This rule has no associated code-style options.

Example

// Code with violations.
class C
{
    void M([NotNullIfNotNull("input")] string? input) { }
}

// Fixed code.
class C
{
    void M([NotNullIfNotNull(nameof(input))] string? input) { }
}

Suppress a warning

If you want to suppress only a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.

#pragma warning disable IDE0280
// The code that's violating the rule is on this line.
#pragma warning restore IDE0280

To disable the rule for a file, folder, or project, set its severity to none in the configuration file.

[*.{cs,vb}]
dotnet_diagnostic.IDE0280.severity = none

To disable all of the code-style rules, set the severity for the category Style to none in the configuration file.

[*.{cs,vb}]
dotnet_analyzer_diagnostic.category-Style.severity = none

For more information, see How to suppress code analysis warnings.