Prefer 'System.Threading.Lock' (IDE0330)

Property	Value
Rule ID	IDE0330
Title	Prefer 'System.Threading.Lock'
Category	Style
Subcategory	Language rules (code-block preferences)
Applicable languages	C# 13+
Options	csharp_prefer_system_threading_lock

Overview

This rule flags places where you can use the .NET 9+ type System.Threading.Lock instead of an object lock.

Options

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

csharp_prefer_system_threading_lock

Property	Value	Description
Option name	csharp_prefer_system_threading_lock
Option values	true	Prefer System.Threading.Lock locks
	false	Disables the rule
Default option value	true

Example

C#

// Code with violations.
private object _gate = new object();

void M()
{
    lock (_gate) { }
}

C#

// Fixed code.
private Lock _gate = new Lock();

void M()
{
    lock (_gate) { }
}

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.

C#

#pragma warning disable IDE0330
// The code that's violating the rule is on this line.
#pragma warning restore IDE0330

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

ini

[*.{cs,vb}]
dotnet_diagnostic.IDE0330.severity = none

To disable all of the code-style rules, set the severity for the category Style to none in the configuration file.

ini

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

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