Use expression body for constructors (IDE0021)
| Property | Value |
|---|---|
| Rule ID | IDE0021 |
| Title | Use expression body for constructors |
| Category | Style |
| Subcategory | Language rules (expression-bodied members) |
| Applicable languages | C# |
| Options | csharp_style_expression_bodied_constructors |
Overview
This style rule concerns the use of expression bodies versus block bodies for constructors.
Options
Set the value of the associated option for this rule to specify whether expression bodies or block bodies for constructors 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_constructors
| Property | Value | Description |
|---|---|---|
| Option name | csharp_style_expression_bodied_constructors | |
| Option values | true |
Prefer expression bodies for constructors |
when_on_single_line |
Prefer expression bodies for constructors when they will be a single line | |
false |
Prefer block bodies for constructors | |
| Default option value | false |
// csharp_style_expression_bodied_constructors = true
public Customer(int age) => Age = age;
// csharp_style_expression_bodied_constructors = false
public Customer(int age) { Age = age; }
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 IDE0021
// The code that's violating the rule is on this line.
#pragma warning restore IDE0021
To disable the rule for a file, folder, or project, set its severity to none in the configuration file.
[*.{cs,vb}]
dotnet_diagnostic.IDE0021.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.
