The core programming model for the Durable Task Framework is contained in the DurableTask.Core package, which is also under active development.

Learning more

There are several places where you can learn more about this framework. Note that some are external and not owned by Microsoft:

• This repo's wiki, which contains more details about the framework and how it can be used.
• The following blog series contains useful information: https://abhikmitra.github.io/blog/durable-task/
• Several useful samples are available here: https://github.com/kaushiksk/durabletask-samples
• You can watch a video with some of the original maintainers in Building Workflows with the Durable Task Framework.
• In some cases, the Azure Durable Functions documentation can actually be useful in learning things about the underlying framework, although not everything will apply.

Development Notes

To run unit tests, you must specify your Service Bus connection string for the tests to use. You can do this via the ServiceBusConnectionString app.config value in the test project, or by defining a DurableTaskTestServiceBusConnectionString environment variable. The benefit of the environment variable is that no temporary source changes are required.

Unit tests also require Azure Storage Emulator, so make sure it's installed and running.

Note: While it's possible to use in tests a real Azure Storage account it is not recommended to do so because many tests will fail with a 409 Conflict error. This is because tests delete and quickly recreate the same storage tables, and Azure Storage doesn't do well in these conditions. If you really want to change Azure Storage connection string you can do so via the StorageConnectionString app.config value in the test project, or by defining a DurableTaskTestStorageConnectionString environment variable.