Add accessibility modifiers (IDE0040)

Property	Value
Rule ID	IDE0040
Title	Add accessibility modifiers
Category	Style
Subcategory	Language rules (modifier preferences)
Applicable languages	C# and Visual Basic
Introduced version	Visual Studio 2017
Options	dotnet_style_require_accessibility_modifiers

Overview

This style rule concerns requiring accessibility modifiers in declarations.

Options

The option value specifies the preferences for required accessibility modifiers.

For information about configuring options, see Option format.

dotnet_style_require_accessibility_modifiers

Property	Value	Description
Option name	dotnet_style_require_accessibility_modifiers
Option values	always	Prefer accessibility modifiers to be specified.
	for_non_interface_members	Prefer accessibility modifiers except for public interface members.
	never	Do not prefer accessibility modifiers to be specified.
	omit_if_default	Prefer accessibility modifiers except if they are the default modifier.
Default option value	for_non_interface_members

// dotnet_style_require_accessibility_modifiers = always
// dotnet_style_require_accessibility_modifiers = for_non_interface_members
class MyClass
{
    private const string thisFieldIsConst = "constant";
}

// dotnet_style_require_accessibility_modifiers = never
class MyClass
{
    const string thisFieldIsConst = "constant";
}

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 IDE0040
// The code that's violating the rule is on this line.
#pragma warning restore IDE0040

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

[*.{cs,vb}]
dotnet_diagnostic.IDE0040.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

• Code style language rules
• Code style rules reference