ST-2026-205 · SDKs & toolchains
AWS Lambda Durable Execution SDK for .NET reaches General Availability
AWS made the Lambda Durable Execution SDK for .NET generally available on 23 July 2026, giving C# developers an idiomatic SDK for resilient long-running Lambda durable functions with checkpointing, callbacks, durable invocation and waits.
Previous state
AWS Lambda durable functions did not yet have a generally available .NET Durable Execution SDK for C# developers.
Current state
The AWS Lambda Durable Execution SDK for .NET is generally available, with C# support for steps, callbacks, durable invocation, waits and local testing for Lambda durable functions.
Affected users
Who needs to care
C# and .NET teams building resilient, long-running workflows on AWS Lambda durable functions.
Required response
What to do
Evaluate the generally available .NET SDK where Lambda durable functions fit application requirements, and validate regional availability, pricing and workflow behavior before production adoption.
Evidence boundary
What the source does not prove
The source proves General Availability of the AWS Lambda Durable Execution SDK for .NET and the named durable-function capabilities. It does not mandate adoption, change Lambda pricing by itself, or prove availability in every AWS Region.
Lifecycle history
Dated event sequence
- AWS Lambda Durable Execution SDK for .NET becomes generally available
AWS announced General Availability of the .NET SDK for Lambda durable functions.
Evidence ledger
First-party sources
- 01Amazon Web Services — AWS Lambda durable execution SDK for .NET is now generally available
Official AWS What's New · 2026-07-23
Open official source ↗