This strongly-typed, client library enables working with Elasticsearch. It is the official client maintained and supported by Elastic.
Elasticsearch .NET Client
Repository for Elastic.Clients.Elasticsearch the official .NET client for Elasticsearch.
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The .NET client for Elasticsearch provides strongly typed requests and responses for Elasticsearch APIs. It delegates protocol handling to the Elastic.Transport library, which takes care of all transport-level concerns (HTTP connection establishment and pooling, retries, etc.).
Versioning
The major and minor version parts of the Elasticsearch .NET client are dictated by the version of the Elasticsearch server.
[!WARNING] This means that the Elasticsearch .NET client does not strictly follows semantic versioning!
Although we try to avoid this as much as possible, it can happen that a minor or even patch version contains breaking changes (see also: breaking changes policy). Please always check the release notes before updating the client package.
Compatibility
Language clients are forward compatible:
Given a constant major version of the client, each related minor version is compatible with its equivalent- and all later Elasticsearch minor versions of the same or next higher major version.
For example:
| Client Version | Compatible with Elasticsearch 8.x |
Compatible with Elasticsearch 9.x |
Compatible with Elasticsearch 10.x |
|---|---|---|---|
| 9.x | ❌ no | ✅ yes | ✅ yes |
| 8.x | ✅ yes | ✅ yes | ❌ no |
Language clients are also backward compatible across minor versions within the same major version (without strong guarantees), but never backward compatible with earlier Elasticsearch major versions.
[!NOTE] Compatibility does not imply feature parity. For example, an
8.12client is compatible with8.13, but does not support any of the new features introduced in Elasticsearch8.13.
Installation
Refer to the Installation section of the getting started documentation.
Connecting
Refer to the Connecting section of the getting started documentation.
Usage
- Creating an index
- Indexing a document
- Getting documents
- Searching documents
- Updating documents
- Deleting documents
- Deleting an index
Documentation
Please refer to the full documentation on elastic.co for comprehensive information on installation, configuration and usage.
The API reference documentation is available here.
Try Elasticsearch and Kibana locally
If you want to try Elasticsearch and Kibana locally, you can run the following command:
curl -fsSL https://elastic.co/start-local | sh
This will run Elasticsearch at http://localhost:9200 and Kibana at http://localhost:5601.
More information is available here.
Contributing
See CONTRIBUTING.md
Copyright and License
This software is Copyright (c) 2014-2025 by Elasticsearch BV.
This is free software, licensed under The Apache License Version 2.0.