Simplify 'default' expression (IDE0034)

#Overview

This style rule concerns using the default literal for default value expressions when the compiler can infer the type of the expression.

#Options

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

#csharp_prefer_simple_default_expression

// csharp_prefer_simple_default_expression = true
void DoWork(CancellationToken cancellationToken = default) { ... }

// csharp_prefer_simple_default_expression = false
void DoWork(CancellationToken cancellationToken = default(CancellationToken)) { ... }

#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 IDE0034
// The code that's violating the rule is on this line.
#pragma warning restore IDE0034

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

[*.{cs,vb}]
dotnet_diagnostic.IDE0034.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

• default literal
• Code style language rules
• Code style rules reference