Stateless 5.20.1

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6.2 This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher. 
dotnet add package Stateless --version 5.20.1
                    


                    

                
NuGet\Install-Package Stateless -Version 5.20.1
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="5.20.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Stateless" Version="5.20.1" />
                    


                            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 5.20.1
                    


                    

                
#r "nuget: Stateless, 5.20.1"
#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@5.20.1
#: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=5.20.1
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Stateless&version=5.20.1
                    


                            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 is compatible.  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.

  • net10.0

    • 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 (15)

Showing the top 15 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.
mrsalmon1976/Stateless.WorkflowEngine
Basic .NET workflow engine based on the awesome stateless State Machine.
Kaioru/Edelstein
A v.95.1 Mushroom game server emulator written in C# .NET
Enzx/NxGraph
NxGraph is a zero-allocation runtime, high-performance finite state machine (FSM) framework for .NET 8+, designed for scenarios where execution speed, memory efficiency, and runtime safety are critical.
Version Downloads Last Updated
5.20.1 7,697 2/9/2026
5.20.1-dev-19407615528 1,497 11/16/2025
5.20.1-dev-19407520956 250 11/16/2025
5.20.0 455,836 9/18/2025
5.20.0-dev-17841589139 338 9/18/2025
5.19.0 112,016 8/22/2025
5.19.0-dev-17621326750 337 9/18/2025
5.19.0-dev-17157499513 174 8/22/2025
5.18.0 100,712 8/3/2025
5.18.0-dev-17151133875 187 8/22/2025
5.18.0-dev-17151048893 176 8/22/2025
5.18.0-dev-17123170070 208 8/21/2025
5.18.0-dev-16986834496 194 8/15/2025
5.18.0-dev-16665478063 152 8/1/2025
5.18.0-dev-16665368567 193 8/1/2025
5.17.0 2,220,598 12/30/2024
5.17.0-dev-16123181037 211 7/7/2025
5.17.0-dev-12573353197 235 1/1/2025
5.17.0-dev-12536414383 225 12/29/2024
5.16.0-dev-12536374438 179 12/29/2024
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