IDE0241: Nullable directive is unnecessary - .NET (original) (raw)

Overview

This rule flags places where a #nullable directive is unnecessary. The directive is unnecessary where there are no reference types that would be impacted by the nullable context scope change. For example:

• #nullable enable in a project where nullable context is already enabled.
• #nullable disable in a project where nullable context is already disabled.
• #nullable disable for an enumeration.
• #nullable disable or #nullable restore at the end of a file that includes #nullable enable in a project where nullable context is disabled.

Options

This rule has no associated code-style options.

Example

// Code with violations (in a project with <Nullable>enable</Nullable>).
#nullable disable
enum Place
{
    First,
    Second
}

// Fixed code.
enum Place
{
    First,
    Second
}

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 IDE0241
// The code that's violating the rule is on this line.
#pragma warning restore IDE0241

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

[*.{cs,vb}]
dotnet_diagnostic.IDE0241.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

• Nullable directive is redundant (IDE0240)