csharp-driver
DataStax C# Driver is an official Apache Cassandra client library for .NET applications, providing synchronous and asynchronous APIs for querying Cassandra clusters. It includes connection pooling, prepared statements, batching, and optional support for DataStax Enterprise features like graph queries and geospatial types.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | datastax/csharp-driver |
| Owner | datastax |
| Primary language | C# |
| License | Apache-2.0 — OSI-approved |
| Stars | 668 |
| Forks | 253 |
| Open issues | 11 |
| Latest release | Unknown |
| Last updated | 2026-04-02 |
| Source | https://github.com/datastax/csharp-driver |
What csharp-driver is
A mature C# client implementing Cassandra's binary protocol with async/await support, connection pooling, load balancing policies, prepared statement caching, and built-in Mapper/Linq components. Targets .NET Framework 4.5.2 and .NET Standard 2.0; available via NuGet.
Get the csharp-driver source
Clone the repository and explore it locally.
git clone https://github.com/datastax/csharp-driver.gitcd csharp-driver# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Cluster configuration (contact points, authentication, load-balancing policies) is required before first use; connection pooling is automatic but tunable.
- Prepared statements should be cached and reused; ad-hoc queries will incur parse overhead on each Cassandra node.
- Async API (ExecuteAsync) is available but synchronous Execute() is also supported; mixing patterns in the same codebase can mask threading issues.
- Consistency levels and retry policies are configurable per-statement; production deployments need a clear policy strategy to avoid silent failures.
- Pagination is automatic via RowSet iteration; large result sets require SetPageSize() tuning to avoid memory pressure or query timeouts.
When to avoid it — and what to weigh
- Greenfield projects without Cassandra expertise — If your team lacks Cassandra operational experience, the complexity of cluster topology, consistency levels, and tuning policies will require significant upfront learning.
- Simple CRUD applications with low scale — Cassandra adds operational overhead; simpler relational or managed NoSQL solutions may be more cost-effective for non-distributed workloads.
- Projects requiring the latest .NET versions only — The driver targets .NET Standard 2.0; if you need cutting-edge .NET 8+ features or async-only patterns, you may face compatibility or design constraints.
- Windows-only deployments with no cross-platform needs — While the driver runs on Windows, Cassandra infrastructure is typically Linux-based; mixed deployment models may introduce operational complexity.
License & commercial use
Apache License 2.0 (Apache-2.0): permissive OSI-approved license allowing commercial use, modification, and distribution with liability disclaimer and trademark protection.
Apache 2.0 explicitly permits commercial use. Distribute the license notice and any NOTICE file; modifications must be documented. No warranty is provided. Consult legal counsel if trademark or patent concerns apply to your use case.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Strong |
| License clarity | Clear |
| Deployment complexity | Moderate |
| DEV.co fit | Strong |
| Assessment confidence | High |
Supports standard Cassandra authentication (PlainText, GSSAPI for DSE). Connection-level security depends on Cassandra node TLS configuration. Driver does not perform input validation; CQL injection risk exists if queries are constructed from user input without parameterization (use prepared statements). No formal security audit data provided; review Cassandra/DSE security bulletins independently.
Alternatives to consider
DataStax Python Driver
If using Python instead of C#, offers similar feature set, mature ecosystem, and native async/await support with fewer .NET Framework constraints.
Datastax Node.js Driver
For JavaScript/TypeScript applications, provides equivalent async patterns and DSE support without .NET runtime dependency.
Cassandra Query Language / Direct JDBC/ODBC Bridges
If .NET integration is not required, direct SQL-like access via JDBC or ODBC bridges may simplify deployment and reduce driver-specific tuning overhead.
Build on csharp-driver with DEV.co software developers
Start with the DataStax C# Driver: install via NuGet, configure your cluster connection, and use prepared statements for production workloads. Consult the documentation index and upgrade guides to plan your migration.
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csharp-driver FAQ
What versions of Cassandra does the driver support?
Can I use the driver with DataStax Astra?
Is the driver open source and free to use?
Does the driver support async/await?
Work with a software development agency
DEV.co is a software development agency delivering custom software development services to companies building on open source. Our software developers and web developers design, integrate, and ship production systems — spanning web development, APIs, AI, data, and cloud. If csharp-driver is part of your open-source databases roadmap, our team can implement, customize, migrate, and maintain it.
Ready to integrate Cassandra with your .NET application?
Start with the DataStax C# Driver: install via NuGet, configure your cluster connection, and use prepared statements for production workloads. Consult the documentation index and upgrade guides to plan your migration.