Stateless 5.20.0

There is a newer prerelease version of this package available.
See the version list below for details.
dotnet add package Stateless --version 5.20.0
                    
NuGet\Install-Package Stateless -Version 5.20.0
                    
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="Stateless" Version="5.20.0" />
                    
For projects that support PackageReference, copy this XML node into the project file to reference the package.
<PackageVersion Include="Stateless" Version="5.20.0" />
                    
Directory.Packages.props
<PackageReference Include="Stateless" />
                    
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 Stateless --version 5.20.0
                    
#r "nuget: Stateless, 5.20.0"
                    
#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 Stateless@5.20.0
                    
#: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=Stateless&version=5.20.0
                    
Install as a Cake Addin
#tool nuget:?package=Stateless&version=5.20.0
                    
Install as a Cake Tool

Stateless

Create state machines and lightweight state machine-based workflows directly in .NET code:

var phoneCall = new StateMachine<State, Trigger>(State.OffHook);

phoneCall.Configure(State.OffHook)
    .Permit(Trigger.CallDialled, State.Ringing);

phoneCall.Configure(State.Connected)
    .OnEntry(t => StartCallTimer())
    .OnExit(t => StopCallTimer())
    .InternalTransition(Trigger.MuteMicrophone, t => OnMute())
    .InternalTransition(Trigger.UnmuteMicrophone, t => OnUnmute())
    .InternalTransition<int>(_setVolumeTrigger, (volume, t) => OnSetVolume(volume))
    .Permit(Trigger.LeftMessage, State.OffHook)
    .Permit(Trigger.PlacedOnHold, State.OnHold);

// ...

phoneCall.Fire(Trigger.CallDialled);
Assert.AreEqual(State.Ringing, phoneCall.State);

This project, as well as the example above, was inspired by Simple State Machine (Archived).

Features

Most standard state machine constructs are supported:

  • Generic support for states and triggers of any .NET type (numbers, strings, enums, etc.)
  • Hierarchical states
  • Entry/exit actions for states
  • Guard clauses to support conditional transitions
  • Introspection

Some useful extensions are also provided:

  • Ability to store state externally (for example, in a property tracked by an ORM)
  • Parameterised triggers
  • Reentrant states
  • Export to DOT and Mermaid graph

Documentation

For guidance on how to use Stateles, the project README file contains documentation and code examples. The source repository also includes a few example projects.

Contributing

We welcome contributions to this project. Check CONTRIBUTING.md for more info.

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 is compatible.  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 is compatible.  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 is compatible.  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.
  • .NETFramework 4.6.2

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.
  • net8.0

    • No dependencies.
  • net9.0

    • No dependencies.

NuGet packages (67)

Showing the top 5 NuGet packages that depend on Stateless:

Package Downloads
LittleForker

A utility to assist with spawing child processes, monitor their lifecycle and co-operative shutdown.

DiegoRangel.DotNet.Framework.CQRS.Domain.Core

A common library for implementing CQRS based Domain layer.

Hyperledger.Aries

.NET Core tools for building agent services

Delfin.Core.Application

A robust Application Layer library designed to facilitate the implementation of business logic and application services in .NET applications. This package provides essential abstractions, command and query handling, and integration with domain models, ensuring a clean architecture and separation of concerns.

WalletFramework

.NET Core tools for building agent services

GitHub repositories (12)

Showing the top 12 popular GitHub repositories that depend on Stateless:

Repository Stars
microsoft/ailab
Experience, Learn and Code the latest breakthrough innovations with Microsoft AI
github/VisualStudio
GitHub Extension for Visual Studio
sipsorcery-org/sipsorcery
A WebRTC, SIP and VoIP library for C# and .NET. Designed for real-time communications apps.
Azure/iotedge
The IoT Edge OSS project
fagenorn/handcrafted-persona-engine
An AI-powered interactive avatar engine using Live2D, LLM, ASR, TTS, and RVC. Ideal for VTubing, streaming, and virtual assistant applications.
dotnetGame/MineCase
Minecraft server based on Orleans
pardahlman/RawRabbit
A modern .NET framework for communication over RabbitMq
NimbleSense/Susalem
加入带锅宫酱,来到苏州耶路撒冷的怀抱吧!
JasonBock/Rocks
A mocking library based on the Compiler APIs (Roslyn + Mocks)
CrossGeeks/xUber
Uber Clone using Xamarin Forms
DynamicTranslator/DynamicTranslator
Instant translation application for windows in .NET :circus_tent:
damianh/LittleForker
A .NET utility library to spawn, supervise and (optionally) cleanly shut down child processes.
Version Downloads Last Updated
5.20.1-dev-19407615528 1,294 11/16/2025
5.20.1-dev-19407520956 249 11/16/2025
5.20.0 407,012 9/18/2025
5.20.0-dev-17841589139 337 9/18/2025
5.19.0 107,927 8/22/2025
5.19.0-dev-17621326750 336 9/18/2025
5.19.0-dev-17157499513 172 8/22/2025
5.18.0 98,783 8/3/2025
5.18.0-dev-17151133875 183 8/22/2025
5.18.0-dev-17151048893 176 8/22/2025
5.18.0-dev-17123170070 206 8/21/2025
5.18.0-dev-16986834496 193 8/15/2025
5.18.0-dev-16665478063 151 8/1/2025
5.18.0-dev-16665368567 189 8/1/2025
5.17.0 2,149,396 12/30/2024
5.17.0-dev-16123181037 211 7/7/2025
5.17.0-dev-12573353197 234 1/1/2025
5.17.0-dev-12536414383 224 12/29/2024
5.16.0 2,300,683 5/24/2024
5.16.0-dev-9828500365 257 7/7/2024
5.16.0-dev-9514287026 229 6/14/2024
5.16.0-dev-9221217254 227 5/24/2024
5.16.0-dev-12536374438 178 12/29/2024
5.16.0-dev-12479904394 181 12/24/2024
5.16.0-dev-12470918423 193 12/23/2024
5.16.0-dev-12470449205 217 12/23/2024
5.16.0-dev-10048603300 242 7/22/2024
5.15.0 1,759,743 12/29/2023
5.15.0-dev-9171714096 217 5/21/2024
5.15.0-dev-9058520056 238 5/13/2024
5.15.0-dev-8822304149 219 4/24/2024
5.15.0-dev-8790594175 237 4/22/2024
5.15.0-dev-8759383160 234 4/19/2024
5.15.0-dev-7356157229 543 12/29/2023
5.14.0 496,670 11/14/2023
5.14.0-dev-7355700004 519 12/29/2023
5.14.0-dev-7309801955 533 12/23/2023
5.14.0-dev-7232734414 542 12/16/2023
5.14.0-dev-7232709282 560 12/16/2023
5.14.0-dev-7164312319 590 12/11/2023
5.14.0-dev-7078872236 585 12/3/2023
5.14.0-dev-7078811950 564 12/3/2023
5.14.0-dev-6860395514 612 11/14/2023
5.14.0-dev-6851669594 582 11/13/2023
5.14.0-dev-6851630770 585 11/13/2023
5.14.0-dev-6823242034 1,093 11/10/2023
5.14.0-dev-6813247520 609 11/9/2023
5.14.0-dev-6811706736 528 11/9/2023
5.14.0-dev-6801352798 580 11/8/2023
5.13.0 2,636,261 12/29/2022
5.13.0-dev-6799430915 554 11/8/2023
5.13.0-dev-6746401636 570 11/7/2023
5.13.0-dev-5455458583 940 7/4/2023
5.13.0-dev-5455401408 771 7/4/2023
5.13.0-dev-5235510771 791 6/11/2023
5.13.0-dev-5157129238 835 6/2/2023
5.13.0-dev-4941000713 1,018 5/10/2023
5.13.0-dev-4940972813 991 5/10/2023
5.13.0-dev-4838097297 808 4/29/2023
5.13.0-dev-4838091545 848 4/29/2023
5.13.0-dev-4838052982 807 4/29/2023
5.13.0-dev-4832488606 825 4/28/2023
5.13.0-dev-4716514070 812 4/17/2023
5.13.0-dev-4701624597 850 4/14/2023
5.13.0-dev-4701061956 834 4/14/2023
5.13.0-dev-4027208421 859 1/27/2023
5.13.0-dev-4027203589 886 1/27/2023
5.13.0-dev-4027201259 882 1/27/2023
5.13.0-dev-3800477155 824 12/29/2022
5.12.0 960,530 10/17/2022
5.12.0-dev-3553426836 873 11/26/2022
5.12.0-dev-3498786305 838 11/18/2022
5.12.0-dev-3267018252 882 10/17/2022
5.11.0 5,157,721 4/28/2021
5.11.0-dev-3264102134 828 10/17/2022
5.11.0-dev-3191463566 845 10/17/2022
5.10.1 498,726 2/17/2021
5.10.1-dev-791423646 1,048 4/28/2021
5.10.1-dev-787896296 1,050 4/27/2021
5.10.1-dev-787889564 1,068 4/27/2021
5.10.1-dev-574334224 1,075 2/17/2021
5.10.0 6,713 2/14/2021
5.10.0-dev-560201439 1,021 2/12/2021
5.10.0-dev-560186344 1,052 2/12/2021
5.10.0-dev-542672901 1,202 2/6/2021
5.10.0-dev-542661127 1,091 2/6/2021
5.2.0 6,822 2/15/2021
5.2.0-dev-568743626 1,103 2/15/2021
5.1.9-dev-00610 1,104 2/6/2021
5.1.9-dev-00600 1,102 1/31/2021
5.1.8 616,890 1/13/2021
5.1.8-dev-00558 1,082 1/16/2021
5.1.8-dev-00553 1,108 1/13/2021
5.1.7 29,454 1/10/2021
5.1.7-dev-00548 1,161 1/10/2021
5.1.6 3,678 1/10/2021
5.1.6-dev-00547 1,164 1/10/2021
5.1.6-dev-00544 1,133 1/10/2021
5.1.5 574,029 11/17/2020
5.1.5-dev-00528 1,110 11/17/2020
5.1.4 99,090 11/7/2020
5.1.4-dev-00522 1,150 11/7/2020
5.1.4-dev-00521 1,169 11/7/2020
5.1.3 1,450,699 8/13/2020
5.1.3-dev-00520 1,227 11/7/2020
5.1.3-dev-00513 1,179 8/12/2020
5.1.2 724,381 4/27/2020
5.1.2-dev-00508 1,115 8/12/2020
5.1.2-dev-00501 1,178 4/27/2020
5.1.1 187,888 4/3/2020
5.1.1-dev-00500 1,219 4/27/2020
5.1.1-dev-00499 1,188 4/27/2020
5.1.1-dev-00492 1,233 4/3/2020
5.1.0 56,216 3/28/2020
5.1.0-dev-00489 1,222 4/3/2020
5.1.0-dev-00486 1,210 4/3/2020
5.1.0-dev-00485 1,227 4/3/2020
5.1.0-dev-00481 1,234 3/26/2020
5.1.0-dev-00480 1,229 3/26/2020
5.1.0-dev-00479 1,148 3/25/2020
5.1.0-dev-00478 1,200 3/25/2020
5.1.0-dev-00477 1,154 3/24/2020
5.0.0 260,855 2/29/2020
5.0.0-dev-00476 1,195 3/24/2020
5.0.0-dev-00473 1,205 3/13/2020
5.0.0-dev-00472 1,188 3/13/2020
5.0.0-dev-00471 1,189 3/13/2020
5.0.0-dev-00464 1,216 2/27/2020
5.0.0-dev-00463 1,285 2/27/2020
4.4.0 273,519 2/7/2020
4.4.0-dev-00453 1,277 2/6/2020
4.4.0-dev-00451 1,235 2/6/2020
4.4.0-dev-00450 1,200 2/6/2020
4.4.0-dev-00447 1,252 2/6/2020
4.4.0-dev-00445 1,170 2/6/2020
4.4.0-dev-00443 1,509 2/6/2020
4.3.0 273,705 11/18/2019
4.2.1 3,627,452 6/2/2018
4.2.0 23,360 6/1/2018
4.2.0-dev-00366 2,012 6/2/2018
4.2.0-dev-00364 1,829 6/1/2018
4.2.0-dev-00363 2,041 6/1/2018
4.2.0-dev-00360 2,031 6/1/2018
4.2.0-dev-00355 2,168 5/31/2018
4.2.0-dev-00350 2,138 5/28/2018
4.2.0-dev-00349 2,143 5/28/2018
4.1.0 42,703 5/18/2018
4.1.0-dev-00341 2,052 5/18/2018
4.1.0-dev-00340 1,991 5/18/2018
4.1.0-dev-00337 2,045 5/18/2018
4.1.0-dev-00331 2,229 5/15/2018
4.1.0-dev-00326 1,857 5/14/2018
4.1.0-dev-00319 4,329 5/11/2018
4.1.0-dev-00316 1,872 5/11/2018
4.1.0-dev-00311 2,128 5/7/2018
4.1.0-dev-00307 2,067 5/4/2018
4.1.0-dev-00299 1,893 4/27/2018
4.0.1-dev-00294 2,313 4/24/2018
4.0.1-dev-00275 13,514 3/24/2018
4.0.1-dev-00260 7,551 10/18/2017
4.0.1-dev-00258 2,074 10/16/2017
4.0.1-dev-00256 2,325 10/6/2017
4.0.0 791,351 9/30/2017
4.0.0-dev-00247 3,722 7/27/2017
4.0.0-dev-00244 3,138 6/15/2017
4.0.0-dev-00242 2,258 6/13/2017
4.0.0-dev-00236 1,972 6/1/2017
4.0.0-dev-00223 2,030 5/19/2017
4.0.0-dev-00221 1,934 5/17/2017
4.0.0-dev-00220 1,869 5/17/2017
4.0.0-dev-00217 3,096 5/15/2017
4.0.0-dev-00196 2,443 4/6/2017
4.0.0-dev-00194 1,882 4/6/2017
4.0.0-dev-00187 1,927 4/6/2017
4.0.0-dev-00177 2,050 3/24/2017
4.0.0-dev-00175 1,908 3/24/2017
4.0.0-dev-00173 1,927 3/24/2017
3.2.0-dev-00170 2,378 3/24/2017
3.2.0-dev-00168 1,956 3/20/2017
3.2.0-dev-00166 2,122 2/28/2017
3.1.1-dev-00165 2,242 2/28/2017
3.1.1-dev-00162 1,912 2/28/2017
3.1.1-dev-00155 1,929 2/20/2017
3.1.1-dev-00152 2,088 2/7/2017
3.1.1-dev-00151 2,022 1/22/2017
3.1.1-dev-00143 2,019 1/3/2017
3.1.1-dev-00141 2,044 1/2/2017
3.1.0 882,919 12/15/2016
3.0.2-dev-00132 2,588 12/8/2016
3.0.1 16,637 11/23/2016
3.0.1-dev-00123 1,962 11/22/2016
3.0.1-dev-00113 2,342 11/11/2016
3.0.0 112,170 11/3/2016
3.0.0-dev-00109 2,111 11/2/2016
3.0.0-dev-00108 2,009 11/2/2016
3.0.0-dev-00106 1,985 11/2/2016
3.0.0-dev-00105 2,164 11/1/2016
3.0.0-dev-00099 2,196 10/31/2016
3.0.0-dev-00094 2,936 10/3/2016
3.0.0-dev-00093 1,887 10/3/2016
3.0.0-dev-00092 1,946 10/3/2016
2.5.84 121,313 8/23/2016
2.5.80 58,297 7/25/2016
2.5.79 79,213 7/19/2016
2.5.68 13,401 7/1/2016
2.5.66 2,567 6/30/2016
2.5.62 25,739 3/29/2016
2.5.61 41,331 3/22/2016
2.5.59 4,342 3/7/2016
2.5.56 19,999 2/25/2016
2.5.53 101,942 2/3/2016
2.5.40 7,839 1/25/2016
2.5.36 23,685 12/10/2015
2.5.29 42,297 11/7/2015
2.5.28 2,579 11/7/2015
2.5.23 4,620 10/28/2015
2.5.21 43,707 7/6/2015
2.5.18 9,627 6/9/2015
2.5.15 13,915 4/9/2015
2.5.11 71,178 10/26/2014
2.5.10 2,754 10/23/2014
2.5.8 7,941 10/20/2014
2.4.0 65,320 3/19/2013
2.3.1.1 56,659 1/7/2011