AsyncKeyedLock 2.0.0

This package has been deprecated as it has critical bugs.

There is a newer version of this package available.
See the version list below for details.

dotnet add package AsyncKeyedLock --version 2.0.0

NuGet\Install-Package AsyncKeyedLock -Version 2.0.0

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="AsyncKeyedLock" Version="2.0.0" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="AsyncKeyedLock" Version="2.0.0" />
                    

                            Directory.Packages.props

<PackageReference Include="AsyncKeyedLock" />
                    

                            Project file

For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.

paket add AsyncKeyedLock --version 2.0.0

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: AsyncKeyedLock, 2.0.0"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

#:package AsyncKeyedLock@2.0.0

#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.

#addin nuget:?package=AsyncKeyedLock&version=2.0.0
                    

                            Install as a Cake Addin

#tool nuget:?package=AsyncKeyedLock&version=2.0.0
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

AsyncKeyedLock

An asynchronous .NET Standard 2.0 library that allows you to lock based on a key.

Installation

The recommended means is to use NuGet, but you could also download the source code from here.

Usage

var asyncKeyedLocker = new AsyncKeyedLocker();
using (var lockObj = await asyncKeyedLocker.LockAsync(myObject))
{
	...
}

You can also set the maximum number of requests for the semaphore that can be granted concurrently (set to 1 by default):

var asyncKeyedLocker = new AsyncKeyedLocker(2);

If you would like to see how many concurrent requests there are for a semaphore for a given key:

int myCount = asyncKeyedLocker.GetCount(myObject);

And if for some reason you need to force release the requests in the semaphore for a key:

asyncKeyedLocker.ForceRelease(myObject);

You may also use Dependency Injection to inject an instance of AsyncKeyedLock.

Credits

This library is based on Stephen Cleary's solution.

Product	Compatible and additional computed target framework versions.
.NET	net5.0 was computed. net5.0-windows was computed. net6.0 was computed. net6.0-android was computed. net6.0-ios was computed. net6.0-maccatalyst was computed. net6.0-macos was computed. net6.0-tvos was computed. net6.0-windows was computed. net7.0 was computed. net7.0-android was computed. net7.0-ios was computed. net7.0-maccatalyst was computed. net7.0-macos was computed. net7.0-tvos was computed. net7.0-windows was computed. net8.0 was computed. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed. net9.0 was computed. net9.0-android was computed. net9.0-browser was computed. net9.0-ios was computed. net9.0-maccatalyst was computed. net9.0-macos was computed. net9.0-tvos was computed. net9.0-windows was computed. net10.0 was computed. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed.
.NET Core	netcoreapp2.0 was computed. netcoreapp2.1 was computed. netcoreapp2.2 was computed. netcoreapp3.0 was computed. netcoreapp3.1 was computed.
.NET Standard	netstandard2.0 is compatible. netstandard2.1 was computed.
.NET Framework	net461 was computed. net462 was computed. net463 was computed. net47 was computed. net471 was computed. net472 was computed. net48 was computed. net481 was computed.
MonoAndroid	monoandroid was computed.
MonoMac	monomac was computed.
MonoTouch	monotouch was computed.
Tizen	tizen40 was computed. tizen60 was computed.
Xamarin.iOS	xamarinios was computed.
Xamarin.Mac	xamarinmac was computed.
Xamarin.TVOS	xamarintvos was computed.
Xamarin.WatchOS	xamarinwatchos was computed.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

.NETStandard 2.0
- No dependencies.

NuGet packages (50)

Showing the top 5 NuGet packages that depend on AsyncKeyedLock:

Package	Downloads
EasyCaching.Core EasyCaching is a open source caching library that contains basic usages and some advanced usages of caching which can help us to handle caching more easier!	14.6M
EFCoreSecondLevelCacheInterceptor Entity Framework Core Second Level Caching Library.	4.9M
N3O.Umbraco.Extensions TODO	3.7M
ZhileTime.Hope.DistributedLocking.Abstractions Package Description	1.9M
Microsoft.OpenApi.Kiota.Builder The core engine behind the OpenAPI based client generator.	628.5K

GitHub repositories (19)

Showing the top 19 popular GitHub repositories that depend on AsyncKeyedLock:

Repository	Stars
jellyfin/jellyfin The Free Software Media System - Server Backend & API	48.7K
abpframework/abp Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.	14.2K
Tyrrrz/DiscordChatExporter Saves Discord chat logs to a file	10.4K
microsoft/kiota OpenAPI based HTTP Client code generator	3.7K
ZiggyCreatures/FusionCache FusionCache is an easy to use, fast and robust hybrid cache with advanced resiliency features.	3.5K
stefanprodan/AspNetCoreRateLimit ASP.NET Core rate limiting middleware	3.2K
dotnetcore/EasyCaching :boom: EasyCaching is an open source caching library that contains basic usages and some advanced usages of caching which can help us to handle caching more easier!	2.1K
smartstore/Smartstore A modular, scalable and ultra-fast open-source all-in-one eCommerce platform built on ASP.NET Core 10	1.5K
VahidN/EFCoreSecondLevelCacheInterceptor EF Core Second Level Cache Interceptor	942
omeryanar/FileExplorer Windows File Explorer alternative with tab browsing	660
Listenarrs/Listenarr Listenarr automates audiobook collection management similar to Sonarr or Radarr, but for audiobooks. It can search, download, and organize your library automatically using metadata from Audible and other sources.	624
ForNeVeR/Cesium C compiler for the CLI platform	436
trimble-oss/dba-dash DBA Dash - SQL Server Monitoring Tool	389
ShokoAnime/Shokofin Repository for Shokofin, a plugin that brings Shoko to Jellyfin.	250
sa-es-ir/DotNet.RateLimit A Distributed RateLimit for Controller-Actions and Minimal API.	147
vesoapp/veso Open source media server.	146
VahidN/DNTCommon.Web.Core DNTCommon.Web.Core provides common scenarios' solutions for ASP.NET Core applications.	141
microsoft/Vipr Client Library Generation Toolkit	108
SaaStacked/saastack A comprehensive codebase template for starting your real-world, fully featured SaaS web products. On the .NET platform	101

Version	Downloads	Last Updated
8.0.2	17,154	2/10/2026
8.0.1	40,169	1/24/2026
8.0.0	63,672	1/2/2026
8.0.0-beta2	119	12/31/2025
8.0.0-beta	117	12/31/2025
7.1.8	836,462	11/23/2025
7.1.8-beta5	186	11/23/2025
7.1.8-beta4	191	11/23/2025
7.1.8-beta3	197	11/23/2025
7.1.8-beta2	185	11/23/2025
7.1.8-beta	187	11/23/2025
7.1.7	272,166	10/4/2025
7.1.6	2,519,470	4/12/2025
7.1.5-alpha	238	4/12/2025
7.1.4	1,049,405	11/22/2024
7.1.4-preview	230	11/22/2024
2.0.0	4,834	3/11/2022

No longer static; now requires you to create an instance and store it, or inject it via dependency injection.