AsyncKeyedLock 6.2.3

.NET 5.0 .NET Standard 2.0
dotnet add package AsyncKeyedLock --version 6.2.3
NuGet\Install-Package AsyncKeyedLock -Version 6.2.3
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="6.2.3" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add AsyncKeyedLock --version 6.2.3
#r "nuget: AsyncKeyedLock, 6.2.3"
#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.
// Install AsyncKeyedLock as a Cake Addin
#addin nuget:?package=AsyncKeyedLock&version=6.2.3

// Install AsyncKeyedLock as a Cake Tool
#tool nuget:?package=AsyncKeyedLock&version=6.2.3

AsyncKeyedLock AsyncKeyedLock

GitHub Workflow Status NuGet NuGet Codacy Grade

An asynchronous .NET Standard 2.0 library that allows you to lock based on a key (keyed semaphores), limiting concurrent threads sharing the same key to a specified number, with optional pooling for reducing memory allocations.

For example, suppose you were processing financial transactions, but while working on one account you wouldn't want to concurrently process a transaction for the same account. Of course, you could just add a normal lock, but then you can only process one transaction at a time. If you're processing a transaction for account A, you may want to also be processing a separate transaction for account B. That's where AsyncKeyedLock comes in: it allows you to lock but only if the key matches.

The library uses two very different methods for locking, one using an underlying ConcurrentDictionary that's cleaned up after use whilst the other using a technique called striped locking. Both have their advantages and disadvantages, and in order to help you choose you are highly recommended to read about it in the wiki.

Installation and usage

The documentation can be found in our wiki.


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Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  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-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-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 is compatible. 
.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)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (23)

Showing the top 5 NuGet packages that depend on AsyncKeyedLock:

Package Downloads
Volo.Abp.DistributedLocking.Abstractions The ID prefix of this package has been reserved for one of the owners of this package by

Package Description




Package Description


Firebend Auto Crud


Package Description

GitHub repositories (6)

Showing the top 5 popular GitHub repositories that depend on AsyncKeyedLock:

Repository Stars
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 and the ASP.NET Core platforms. Provides the fundamental infrastructure, production-ready startup templates, application modules, UI themes, tooling, guides and documentation.
Exports Discord chat logs to a file
ASP.NET Core rate limiting middleware
A modular, scalable and ultra-fast open-source all-in-one eCommerce platform built on ASP.NET Core 7
Windows File Explorer alternative with tab browsing
Version Downloads Last updated
6.2.3 126 12/3/2023
6.2.3-beta 46 12/2/2023
6.2.2 34,554 10/9/2023
6.2.1 930,606 4/10/2023
6.2.0 70,919 2/25/2023
6.1.1 51,838 1/27/2023
6.1.1-rc 368 1/27/2023
6.1.1-beta 335 1/27/2023
6.1.0 13,990 1/26/2023
6.0.5 29,382 1/2/2023
6.0.5-alpha 383 12/30/2022
6.0.4 1,143 12/30/2022
6.0.4-rc6 372 12/30/2022
6.0.4-rc5 395 12/30/2022
6.0.4-rc3 383 12/30/2022
6.0.4-rc 354 12/29/2022
6.0.4-beta 387 12/29/2022
6.0.4-alpha 388 12/29/2022
6.0.3 1,631 12/29/2022
6.0.2 25,522 12/18/2022
6.0.1 1,007 12/17/2022
5.1.2 2,099 12/16/2022
5.1.1 9,313 12/13/2022
5.1.0 2,309 12/3/2022
5.0.4 8,640 11/27/2022
5.0.3 1,514 11/26/2022
5.0.3-rc 374 11/26/2022
5.0.2-rc 404 11/26/2022
5.0.1 2,004 11/19/2022
4.0.2 3,920 11/13/2022
3.2.3 2,356 10/26/2022
3.2.1 1,367 10/23/2022
3.2.0 1,116 10/23/2022
3.0.1 1,554 10/18/2022
3.0.0 1,385 10/16/2022
2.0.3 15,439 6/29/2022
2.0.2 13,788 3/13/2022
2.0.1 1,457 3/13/2022
2.0.0 1,493 3/11/2022
1.1.0 2,675 12/11/2021
1.0.1 1,453 11/22/2021
1.0.0 1,078 11/22/2021

Allowed optional continueOnCapturedContext, defaulting to false.