Use local function instead of lambda (IDE0039)
Artikkeli 25.07.2023
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Overview
Options
Suppress a warning
See also
Laajenna taulukko
Property
Value
Rule ID
IDE0039
Title
Use local function instead of lambda
Category
Style
Subcategory
Language rules (expression-level preferences)
Applicable languages
C#
Options
csharp_style_prefer_local_over_anonymous_function
This style rule concerns the use of local functions versus lambda expressions (anonymous functions).
Options specify the behavior that you want the rule to enforce. For information about configuring options, see Option format .
csharp_style_prefer_local_over_anonymous_function
Laajenna taulukko
Property
Value
Description
Option name
csharp_style_prefer_local_over_anonymous_function
Option values
true
Prefer local functions over anonymous functions
false
Prefer anonymous functions over local functions
Default option value
true
int fibonacci (int n )
{
return n <= 1 ? 1 : fibonacci(n-1 ) + fibonacci(n-2 );
}
Func<int , int > fibonacci = (int n) =>
{
return n <= 1 ? 1 : fibonacci(n - 1 ) + fibonacci(n - 2 );
};
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 IDE0039
#pragma warning restore IDE0039
To disable the rule for a file, folder, or project, set its severity to none
in the configuration file .
[*.{cs,vb}]
dotnet_diagnostic.IDE0039.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 .