Elasticsearch .NET Client is a strongly-typed client library for working with Elasticsearch from .NET applications.
The client provides strongly typed requests and responses for Elasticsearch APIs, eliminating the need to work with untyped JSON structures. It delegates protocol-level concerns such as HTTP connection establishment, connection pooling, and retry logic to the Elastic.Transport library, allowing developers to focus on query and data manipulation logic rather than transport infrastructure.
Teams building .NET applications that need to interact with Elasticsearch should adopt this client. It suits projects of any scale that benefit from compile-time type safety and IDE support when constructing Elasticsearch queries. As the official client maintained by Elastic, it receives ongoing support and updates aligned with Elasticsearch server releases.
The project follows a versioning scheme tied to Elasticsearch server versions rather than semantic versioning, meaning minor or patch releases can introduce breaking changes. Developers should review release notes before upgrading. The client maintains forward compatibility within major versions, so an 8.x client works with Elasticsearch 8.x and 9.x, while a 9.x client works with 9.x and 10.x. Backward compatibility across minor versions within the same major version is supported without strong guarantees, but earlier major versions are never supported. The project is actively maintained by Elastic with regular updates to support new Elasticsearch features and versions.
