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Use UTF-8 string literal (IDE0230)

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Property Value
Rule ID IDE0230
Title Use UTF-8 string literal
Category Style
Subcategory Language rules (expression-level preferences)
Applicable languages C# 11+
Options csharp_style_prefer_utf8_string_literals

Overview

This rule flags the use of a byte array (byte[]) where a UTF-8 string literal could be used instead. Using a UTF-8 string literal adds clarity to the declaration.

Options

Options specify the behavior that you want the rule to enforce. For information about configuring options, see Option format.

csharp_style_prefer_utf8_string_literals

Property Value Description
Option name csharp_style_prefer_utf8_string_literals
Option values true Prefer UTF-8 string literals to byte arrays.
false Disables the rule.
Default option value true

Example

C# 
// Code with violations.
ReadOnlySpan<byte> _ = new byte[] { 65, 66, 67 };

// Fixed code.
ReadOnlySpan<byte> _ = "ABC"u8;

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.

C# 
#pragma warning disable IDE0230
// The code that's violating the rule is on this line.
#pragma warning restore IDE0230

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

ini 
[*.{cs,vb}]
dotnet_diagnostic.IDE0230.severity = none

To disable all of the code-style rules, set the severity for the category Style to none in the configuration file.

ini 
[*.{cs,vb}]
dotnet_analyzer_diagnostic.category-Style.severity = none

For more information, see How to suppress code analysis warnings.

See also