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Use expression body for indexers (IDE0026)

  • Article
Property Value
Rule ID IDE0026
Title Use expression body for indexers
Category Style
Subcategory Language rules (expression-bodied members)
Applicable languages C#
Options csharp_style_expression_bodied_indexers

Overview

This style rule concerns the use of expression bodies versus block bodies for indexers.

Options

Set the value of the associated option for this rule to specify whether expression bodies or block bodies for indexers are preferred, and if expression bodies are preferred, whether they're preferred only for single-line expressions.

For more information about configuring options, see Option format.

csharp_style_expression_bodied_indexers

Property Value Description
Option name csharp_style_expression_bodied_indexers
Option values true Prefer expression bodies for indexers
when_on_single_line Prefer expression bodies for indexers when they will be a single line
false Prefer block bodies for indexers
Default option value true 
// csharp_style_expression_bodied_indexers = true
public T this[int i] => _values[i];

// csharp_style_expression_bodied_indexers = false
public T this[int i] { get { return _values[i]; } }

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 IDE0026
// The code that's violating the rule is on this line.
#pragma warning restore IDE0026

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

[*.{cs,vb}]
dotnet_diagnostic.IDE0026.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.

See also