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

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`

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

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

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

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

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 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.

[*.{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.

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