Nullable directive is unnecessary (IDE0241)
Property | Value |
---|---|
Rule ID | IDE0241 |
Title | Nullable directive is unnecessary |
Category | Style |
Subcategory | Unnecessary code rules (expression-level preferences) |
Applicable languages | C# |
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
Phản hồi
https://aka.ms/ContentUserFeedback.
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