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Use conditional delegate call (IDE1005)

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Property Value
Rule ID IDE1005
Title Use conditional delegate call
Category Style
Subcategory Language rules (null-checking preferences)
Applicable languages C#
Options csharp_style_conditional_delegate_call

Overview

This style rule concerns the use of the null-conditional operator (?.) when invoking a lambda expression, as opposed to performing a null check.

Options

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

csharp_style_conditional_delegate_call

Property Value Description
Option name csharp_style_conditional_delegate_call
Option values true Prefer to use the conditional coalescing operator (?.) when invoking a lambda expression
false Prefer to perform a null check before invoking a lambda expression
Default option value true 
// csharp_style_conditional_delegate_call = true
func?.Invoke(args);

// csharp_style_conditional_delegate_call = false
if (func != null) { func(args); }

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 IDE1005
// The code that's violating the rule is on this line.
#pragma warning restore IDE1005

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

[*.{cs,vb}]
dotnet_diagnostic.IDE1005.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