Use UTF-8 string literal (IDE0230)

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

// 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.

#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.

[*.{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.

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

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

See also

• UTF-8 string literals
• Code style rules reference