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Lightweight workflow engine for .NET Standard
| Date | Stars |
|---|---|
| 2026-07-24 | 5907 |
| 2026-07-25 | 5907 |
| 2026-07-28 | 5907 |
| 2026-07-30 | 5906 |
| 2026-08-06 | 5906 |
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# Workflow Core
[](https://ci.appveyor.com/project/danielgerlag/workflow-core)
[<img src="https://api.gitsponsors.com/api/badge/img?id=73864802" height="20">](https://api.gitsponsors.com/api/badge/link?p=xj6mObb7nZAJGyuABfd8nD5XWf3SE4oUfw0vmCgSiJeIfNlzJAej0FWX8oFdYm6D7bvZpCf6qANVBNPWid4dRQ==)
Workflow Core is a light weight embeddable workflow engine targeting .NET Standard. Think: long running processes with multiple tasks that need to track state. It supports pluggable persistence and concurrency providers to allow for multi-node clusters.
### Announcements
#### New related project: Conductor
Conductor is a stand-alone workflow server as opposed to a library that uses Workflow Core internally. It exposes an API that allows you to store workflow definitions, track running workflows, manage events and define custom steps and scripts for usage in your workflows.
https://github.com/danielgerlag/conductor
## Documentation
See [Tutorial here.](https://workflow-core.readthedocs.io)
## Fluent API
Define your workflows with the fluent API.
```c#
public class MyWorkflow : IWorkflow
{
public void Build(IWorkflowBuilder<MyData> builder)
{
builder
.StartWith<Task1>()
.Then<Task2>()
.Then<Task3>();
}
}
```
## JSON / YAML Workflow Definitions
Define your workflows in JSON or YAML, need to install WorkFlowCore.DSL
```json
{
"Id": "HelloWorld",
"Version": 1,
"Steps": [
{
"Id": "Hello",
"StepType": "MyApp.HelloWorld, MyApp",
"NextStepId": "Bye"
},
{
"Id": "Bye",
"StepType": "MyApp.GoodbyeWorld, MyApp"
}
]
}
```
```yaml
Id: HelloWorld
Version: 1
Steps:
- Id: Hello
StepType: MyApp.HelloWorld, MyApp
NextStepId: Bye
- Id: Bye
StepType: MyApp.GoodbyeWorld, MyApp
```
## Sample use cases
* New user workflow
```c#
public class MyData
{
public string Email { get; set; }
public string Password { get; set; }
public string UserId { get; set; }
}
public class MyWorkflow : IWorkflow
{
public void Build(IWorkflowBuilder<MyData> builder)
{
builder
.StartWith<CreateUser>()
.Input(step => step.Email, data => data.Email)
.Input(step => step.Password, data => data.Password)
.Output(data => data.UserId, step => step.UserId)
.Then<SendConfirmationEmail>()
.WaitFor("confirmation", data => data.UserId)
.Then<UpdateUser>()
.Input(step => step.UserId, data => data.UserId);
}
}
```
* Saga Transactions
```c#
public class MyWorkflow : IWorkflow
{
public void Build(IWorkflowBuilder<MyData> builder)
{
builder
.StartWith<CreateCustomer>()
.Then<PushToSalesforce>()
.OnError(WorkflowErrorHandling.Retry, TimeSpan.FromMinutes(10))
.Then<PushToERP>()
.OnError(WorkflowErrorHandling.Retry, TimeSpan.FromMinutes(10));
}
}
```
```c#
builder
.StartWith<LogStart>()
.Saga(saga => saga
.StartWith<Task1>()
.CompensateWith<UndoTask1>()
.Then<Task2>()
.CompensateWith<UndoTask2>()
.Then<Task3>()
.CompensateWith<UndoTask3>()
)
.OnError(Models.WorkflowErrorHandling.Retry, TimeSpan.FromMinutes(10))
.Then<LogEnd>();
```
## Persistence
Since workflows are typically long running processes, they will need to be persisted to storage between steps.
There are several persistence providers available as separate Nuget packages.
* MemoryPersistenceProvider *(Default provider, for demo and testing purposes)*
* [MongoDB](src/providers/WorkflowCore.Persistence.MongoDB)
* [Cosmos DB](src/providers/WorkflowCore.Providers.Azure)
* [Amazon DynamoDB](src/providers/WorkflowCore.Providers.AWS)
* [SQL Server](src/providers/WorkflowCore.Persistence.SqlServer)
* [PostgreSQL](src/pExcerpt of 6,380 characters
Read on GitHub
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Gabriel Lucaci · @SwissLife-OSS · Switzerland
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Christian Jundt · Sinalys · France
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Demian Marty · 4tecture GmbH · Switzerland
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Mario Andron · Palantir (Pty) Ltd · South Africa
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Mikhail Merkulov · Ukraine
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Would you bet a product on this? Bounded 0–100 and slow moving.
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