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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.
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 |
// csharp_style_prefer_local_over_anonymous_function = true
int fibonacci(int n)
{
return n <= 1 ? 1 : fibonacci(n-1) + fibonacci(n-2);
}
// csharp_style_prefer_local_over_anonymous_function = false
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
// The code that's violating the rule is on this line.
#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.
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Events
17 Mar, 21 - 21 Mar, 10
Join the meetup series to build scalable AI solutions based on real-world use cases with fellow developers and experts.
Register now