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CassandraCSharpDriver

3.23.018M downloads/modatastax/csharp-driver ↗New releases in your daily digest, changelog included.

A modern, feature-rich and highly tunable C# client library for Apache Cassandra and DataStax Enterprise

Last release 13 days ago
24 Sep 2026
Ships unpredictably
gaps range from 3 weeks to 1.9 years
Nearly every release is documented
notes for 57 of the last 60 stable releases
7 versions withdrawn
withdrawn after publishing
127 years old
98 releases · first in 1900

Release timeline

98 releases since 1900

1900190219041906190819101912191419161918192019221924192619281930193219341936193819401942194419461948195019521954195619581960196219641966196819701972197419761978198019821984198619881990199219941996199820002002200420062008201020122014201620182020202220242026

19002026

One column per quarter.

Releases

2.7.313 Nov 2015
Mapper and Linq: Fixed regression introduced in v2.7.2 that failed to map columns with null values to structs.
2015-11-13

Notable Changes

Mapper and Linq: Fixed regression introduced in v2.7.2 that failed to map columns with null values to structs.

Bug Fixes

[CSHARP-371] - Mapper: Allow default(T) for null values
Open source →
2.7.26 Oct 2015
[CSHARP-337] - Make PreparedStatement mockable
2015-10-06

Features

[CSHARP-337] - Make PreparedStatement mockable

Bug Fixes

[CSHARP-342] - Custom type converters do not work

[CSHARP-345] - Regression: Support server error in STARTUP response for C* 2.1

[CSHARP-346] - Mapper: Support anonymous type containing a nullable column for value types

[CSHARP-347] - Improve exception message for null values on collections
Open source →
2.7.117 Sept 2015
[CSHARP-344] - Calling Socket.ConnectAsync() can result in uncaught exception
2015-09-17

Bug Fixes

[CSHARP-344] - Calling Socket.ConnectAsync() can result in uncaught exception
Open source →
2.7.010 Sept 2015
Cluster: All requests use a client read timeout that can be configured using SocketOptions.SetReadTimeoutMillis(int), disabled by default
2015-09-10

Notable Changes

Cluster: All requests use a client read timeout that can be configured using SocketOptions.SetReadTimeoutMillis(int), disabled by default

Cluster: Added support for speculative query executions

Features

[CSHARP-273] - New Retry Policy Decision - try next host

[CSHARP-311] - Cluster-level reusable timer: Hashed Wheel Timer

[CSHARP-314] - Use Immutable collections for Hosts and the Connection pool

[CSHARP-243] - Speculative query retries

[CSHARP-279] - Make connection and pool creation non blocking

[CSHARP-280] - Schedule reconnections using Timers

[CSHARP-328] - Linq support for StartsWith()

[CSHARP-332] - Per-Host Request Timeout

Bug Fixes

[CSHARP-260] - Default QueryAbortTimeout value should not be Infinite

[CSHARP-296] - Driver hangs when system.peers is mucked up.

[CSHARP-316] - RequestHandler retry should not use a new query plan

[CSHARP-325] - Enum column mapping to int is not supported in Linq Update()

[CSHARP-333] - Allow Heartbeat interval be set to zero to disable it

[CSHARP-338] - TcpSocket.ReceiveAsync() raises ObjectDisposedException that faults the user Task

[CSHARP-339] - Host reconnection delay Read operation and isUp Write operation are not thread-safe

[CSHARP-340] - Switching keyspace at level after disposing connection results in ObjectDisposedException
Open source →
2.6.010 Aug 2015
Added support for Cassandra 2.2 types and features
2015-08-10

Notable Changes

Added support for Cassandra 2.2 types and features

Features

[CSHARP-282] - Support UDF and Aggregate Function Schema Meta

[CSHARP-283] - Add client address to query trace

[CSHARP-285] - Support protocol v4 exceptions

[CSHARP-287] - Use PK columns from v4 prepared responses

[CSHARP-290] - Key-value payloads in native protocol v4

[CSHARP-291] - Small int and byte types for C* 2.2

[CSHARP-293] - Support new date and time types

[CSHARP-303] - Add support for client warnings

[CSHARP-304] - Distinguish between NULL and UNSET values in Prepared Statements

[CSHARP-305] - Support server error in STARTUP response for C* 2.1
Open source →
2.6.0-rc116 Jul 2015pre-release
Nothing published for this version
2.5.28 Apr 2015
[CSHARP-255] - Use active connection to wait for schema agreement
2015-04-08

Bug Fixes

[CSHARP-255] - Use active connection to wait for schema agreement

[CSHARP-268] - Linq Select() projections for Update() do not support fields

[CSHARP-269] - Mapper always sets automatic paging to false
Open source →
2.5.123 Mar 2015
[CSHARP-211] - Make Statement.SetRoutingKey() api more friendly
2015-03-23

Features

[CSHARP-146] - Manual paging

[CSHARP-211] - Make Statement.SetRoutingKey() api more friendly

[CSHARP-240] - Log additional information on RequestHandler and Connection classes

[CSHARP-242] - Make pool creation, after node considered back up, less eager

[CSHARP-245] - Use specific TaskScheduler for calling callbacks from the Connection

[CSHARP-251] - Support Lightweight Transactions in the Mapper API

[CSHARP-258] - Add TCP NoDelay socket option

[CSHARP-261] - Linq: Manual paging

[CSHARP-262] - Mapper: Manual paging

Bug Fixes

[CSHARP-246] - ObjectDisposedException in Connection.WriteCompletedHandler()

[CSHARP-252] - Metadata.HostEvent is not firing when a node is Down, it does fire when a node is Up

[CSHARP-253] - RPTokenFactory produces negative hashes

[CSHARP-254] - TokenMap doesn't handle adjacent ranges owned by the same host

[CSHARP-264] - Builder.WithPort() option not considered

[CSHARP-266] - Connection: Serialization of bad frames can result in NullReferenceException
Open source →
2.5.05 Feb 2015Deprecated
[CSHARP-174] - Deprecate SimpleStatement.Bind and add constructor params
2015-02-05

Features

[CSHARP-234] - Support Freezing and Nested Collections

[CSHARP-174] - Deprecate SimpleStatement.Bind and add constructor params

[CSHARP-176] - Mark Session.WaitForSchemaAgreement() as Obsolete

[CSHARP-235] - Mapper & Linq: Issue a log warning when the number of prepared statements is large

[CSHARP-239] - Make RowSet.GetEnumerator() and Row.GetValue() methods mockable

Bug Fixes

[CSHARP-227] - ReplicationStrategies now internal?

[CSHARP-237] - Linq Table<T>.Create() does not use provided keyspace when using constructor that specifies it

[CSHARP-241] - TaskHelper.Continue() calls to SynchronizationContext.Post can cause deadlocks

[CSHARP-247] - Support for COM single threaded apartment model

[CSHARP-248] - QueryOptions PageSize setting not being respected
Open source →
2.5.0-rc115 Jan 2015pre-release
Integrated CqlPoco into the driver codebase
2015-01-15

Notable Changes

Integrated CqlPoco into the driver codebase

Features

[CSHARP-199] - Integrate CqlPoco

[CSHARP-165] - Add an address translator

[CSHARP-173] - Linq Counter column support

[CSHARP-81] - Cannot add item to collection column using linq

[CSHARP-89] - Ignore attribute for object properties would be really useful

[CSHARP-92] - Makes it possible to provide Table and Keyspace creation options to Linq

[CSHARP-123] - Linq: Make identifier quoting optional

[CSHARP-128] - Linq CreateTablesIfNotExist: varint support

[CSHARP-143] - Strong Name the NuGet Assemblies

[CSHARP-144] - Linq: CQL functions support

[CSHARP-153] - Performance optimization for adapt Rows to entities

[CSHARP-214] - Use InvalidTypeException with a clear message when conversion is not valid

[CSHARP-215] - Make mapping Fetch<T>() lazy

[CSHARP-233] - Support SortedSet and HashSet as valid sets and arrays as valid List or Set values

Bug Fixes

[CSHARP-170] - When Changing Key Space after a Prepare, the driver goes into a recursive exception pattern causing the application to be blocked

[CSHARP-229] - Internal class Cassandra.TcpSocket leaks memory that can cause long running multiple/many C* sessions with large records to run OOM

[CSHARP-231] - Batch ExecutionInfo always returns consistency Any as achieved consistency
Open source →
2.1.723 Mar 2015
Nothing published for this version
2.1.65 Feb 2015
Nothing published for this version
2.1.52 Dec 2014
Nothing published for this version
2.1.411 Nov 2014
Nothing published for this version
2.1.322 Sept 2014
Nothing published for this version
2.1.227 Aug 2014
Nothing published for this version
2.1.118 Aug 2014
Nothing published for this version
2.1.012 Aug 2014
Nothing published for this version
2.1.0-rc117 Jul 2014pre-release
Nothing published for this version
2.1.0-beta110 Jul 2014pre-release
Nothing published for this version
2.0.317 Jun 2014
Nothing published for this version
2.0.228 May 2014
Nothing published for this version
2.0.11 Jan 1900withdrawn
Nothing published for this version
2.0.01 Jan 1900withdrawn
Nothing published for this version
2.0.0-beta26 May 2014pre-release
Nothing published for this version
2.0.0-beta115 Apr 2014pre-release
Nothing published for this version
1.0.421 Mar 2014
Nothing published for this version
1.0.321 Jan 2014
Nothing published for this version
1.0.229 Nov 2013
Nothing published for this version
1.0.126 Sept 2013
[CSHARP-817] - App.Metrics snapshot fails when timer metrics don't have any recorded values
2019-11-11

Bug fixes

[CSHARP-817] - App.Metrics snapshot fails when timer metrics don't have any recorded values
Open source →
1.0.01 Jul 2013
Nothing published for this version
1.0.0-beta41 Jan 1900pre-releasewithdrawn
Nothing published for this version
1.0.0-beta31 Jan 1900pre-releasewithdrawn
Nothing published for this version
1.0.0-beta21 Jan 1900pre-releasewithdrawn
Nothing published for this version
1.0.0-beta113 Jun 2013pre-release
Nothing published for this version
0.9.113 Jun 2013
Nothing published for this version
3.4.0.116 Jan 2018
Nothing published for this version
3.1.0.124 Oct 2016
Nothing published for this version

Your coding agent can read these notes before it upgrades. Set up the MCP server →

Releases

2.7.313 Nov 2015

Mapper and Linq: Fixed regression introduced in v2.7.2 that failed to map columns with null values to structs.

2015-11-13

Notable Changes

Mapper and Linq: Fixed regression introduced in v2.7.2 that failed to map columns with null values to structs.

Bug Fixes

[CSHARP-371] - Mapper: Allow default(T) for null values

Open source →

2.7.26 Oct 2015

[CSHARP-337] - Make PreparedStatement mockable

2015-10-06

Features

[CSHARP-337] - Make PreparedStatement mockable

Bug Fixes

[CSHARP-342] - Custom type converters do not work
[CSHARP-345] - Regression: Support server error in STARTUP response for C* 2.1
[CSHARP-346] - Mapper: Support anonymous type containing a nullable column for value types
[CSHARP-347] - Improve exception message for null values on collections

Open source →

2.7.117 Sept 2015

[CSHARP-344] - Calling Socket.ConnectAsync() can result in uncaught exception

2015-09-17

Bug Fixes

[CSHARP-344] - Calling Socket.ConnectAsync() can result in uncaught exception

Open source →

2.7.010 Sept 2015

Cluster: All requests use a client read timeout that can be configured using SocketOptions.SetReadTimeoutMillis(int), disabled by default

2015-09-10

Notable Changes

Cluster: All requests use a client read timeout that can be configured using SocketOptions.SetReadTimeoutMillis(int), disabled by default
Cluster: Added support for speculative query executions

Features

[CSHARP-273] - New Retry Policy Decision - try next host
[CSHARP-311] - Cluster-level reusable timer: Hashed Wheel Timer
[CSHARP-314] - Use Immutable collections for Hosts and the Connection pool
[CSHARP-243] - Speculative query retries
[CSHARP-279] - Make connection and pool creation non blocking
[CSHARP-280] - Schedule reconnections using Timers
[CSHARP-328] - Linq support for StartsWith()
[CSHARP-332] - Per-Host Request Timeout

Bug Fixes

[CSHARP-260] - Default QueryAbortTimeout value should not be Infinite
[CSHARP-296] - Driver hangs when system.peers is mucked up.
[CSHARP-316] - RequestHandler retry should not use a new query plan
[CSHARP-325] - Enum column mapping to int is not supported in Linq Update()
[CSHARP-333] - Allow Heartbeat interval be set to zero to disable it
[CSHARP-338] - TcpSocket.ReceiveAsync() raises ObjectDisposedException that faults the user Task
[CSHARP-339] - Host reconnection delay Read operation and isUp Write operation are not thread-safe
[CSHARP-340] - Switching keyspace at level after disposing connection results in ObjectDisposedException

Open source →

2.6.010 Aug 2015

Added support for Cassandra 2.2 types and features

2015-08-10

Notable Changes

Added support for Cassandra 2.2 types and features

Features

[CSHARP-282] - Support UDF and Aggregate Function Schema Meta
[CSHARP-283] - Add client address to query trace
[CSHARP-285] - Support protocol v4 exceptions
[CSHARP-287] - Use PK columns from v4 prepared responses
[CSHARP-290] - Key-value payloads in native protocol v4
[CSHARP-291] - Small int and byte types for C* 2.2
[CSHARP-293] - Support new date and time types
[CSHARP-303] - Add support for client warnings
[CSHARP-304] - Distinguish between NULL and UNSET values in Prepared Statements
[CSHARP-305] - Support server error in STARTUP response for C* 2.1

Open source →

2.6.0-rc116 Jul 2015pre-release

Nothing published for this version

2.5.28 Apr 2015

[CSHARP-255] - Use active connection to wait for schema agreement

2015-04-08

Bug Fixes

[CSHARP-255] - Use active connection to wait for schema agreement
[CSHARP-268] - Linq Select() projections for Update() do not support fields
[CSHARP-269] - Mapper always sets automatic paging to false

Open source →

2.5.123 Mar 2015

[CSHARP-211] - Make Statement.SetRoutingKey() api more friendly

2015-03-23

Features

[CSHARP-146] - Manual paging
[CSHARP-211] - Make Statement.SetRoutingKey() api more friendly
[CSHARP-240] - Log additional information on RequestHandler and Connection classes
[CSHARP-242] - Make pool creation, after node considered back up, less eager
[CSHARP-245] - Use specific TaskScheduler for calling callbacks from the Connection
[CSHARP-251] - Support Lightweight Transactions in the Mapper API
[CSHARP-258] - Add TCP NoDelay socket option
[CSHARP-261] - Linq: Manual paging
[CSHARP-262] - Mapper: Manual paging

Bug Fixes

[CSHARP-246] - ObjectDisposedException in Connection.WriteCompletedHandler()
[CSHARP-252] - Metadata.HostEvent is not firing when a node is Down, it does fire when a node is Up
[CSHARP-253] - RPTokenFactory produces negative hashes
[CSHARP-254] - TokenMap doesn't handle adjacent ranges owned by the same host
[CSHARP-264] - Builder.WithPort() option not considered
[CSHARP-266] - Connection: Serialization of bad frames can result in NullReferenceException

Open source →

2.5.05 Feb 2015Deprecated

[CSHARP-174] - Deprecate SimpleStatement.Bind and add constructor params

2015-02-05

Features

[CSHARP-234] - Support Freezing and Nested Collections
[CSHARP-174] - Deprecate SimpleStatement.Bind and add constructor params
[CSHARP-176] - Mark Session.WaitForSchemaAgreement() as Obsolete
[CSHARP-235] - Mapper & Linq: Issue a log warning when the number of prepared statements is large
[CSHARP-239] - Make RowSet.GetEnumerator() and Row.GetValue() methods mockable

Bug Fixes

[CSHARP-227] - ReplicationStrategies now internal?
[CSHARP-237] - Linq Table<T>.Create() does not use provided keyspace when using constructor that specifies it
[CSHARP-241] - TaskHelper.Continue() calls to SynchronizationContext.Post can cause deadlocks
[CSHARP-247] - Support for COM single threaded apartment model
[CSHARP-248] - QueryOptions PageSize setting not being respected

Open source →

2.5.0-rc115 Jan 2015pre-release

Integrated CqlPoco into the driver codebase

2015-01-15

Notable Changes

Integrated CqlPoco into the driver codebase

Features

[CSHARP-199] - Integrate CqlPoco
[CSHARP-165] - Add an address translator
[CSHARP-173] - Linq Counter column support
[CSHARP-81] - Cannot add item to collection column using linq
[CSHARP-89] - Ignore attribute for object properties would be really useful
[CSHARP-92] - Makes it possible to provide Table and Keyspace creation options to Linq
[CSHARP-123] - Linq: Make identifier quoting optional
[CSHARP-128] - Linq CreateTablesIfNotExist: varint support
[CSHARP-143] - Strong Name the NuGet Assemblies
[CSHARP-144] - Linq: CQL functions support
[CSHARP-153] - Performance optimization for adapt Rows to entities
[CSHARP-214] - Use InvalidTypeException with a clear message when conversion is not valid
[CSHARP-215] - Make mapping Fetch<T>() lazy
[CSHARP-233] - Support SortedSet and HashSet as valid sets and arrays as valid List or Set values

Bug Fixes

[CSHARP-170] - When Changing Key Space after a Prepare, the driver goes into a recursive exception pattern causing the application to be blocked
[CSHARP-229] - Internal class Cassandra.TcpSocket leaks memory that can cause long running multiple/many C* sessions with large records to run OOM
[CSHARP-231] - Batch ExecutionInfo always returns consistency Any as achieved consistency

Open source →

2.1.723 Mar 2015

Nothing published for this version

2.1.65 Feb 2015

Nothing published for this version

2.1.52 Dec 2014

Nothing published for this version

2.1.411 Nov 2014

Nothing published for this version

2.1.322 Sept 2014

Nothing published for this version

2.1.227 Aug 2014

Nothing published for this version

2.1.118 Aug 2014

Nothing published for this version

2.1.012 Aug 2014

Nothing published for this version

2.1.0-rc117 Jul 2014pre-release

Nothing published for this version

2.1.0-beta110 Jul 2014pre-release

Nothing published for this version

2.0.317 Jun 2014

Nothing published for this version

2.0.228 May 2014

Nothing published for this version

2.0.11 Jan 1900withdrawn

Nothing published for this version

2.0.01 Jan 1900withdrawn

Nothing published for this version

2.0.0-beta26 May 2014pre-release

Nothing published for this version

2.0.0-beta115 Apr 2014pre-release

Nothing published for this version

1.0.421 Mar 2014

Nothing published for this version

1.0.321 Jan 2014

Nothing published for this version

1.0.229 Nov 2013

Nothing published for this version

1.0.126 Sept 2013

[CSHARP-817] - App.Metrics snapshot fails when timer metrics don't have any recorded values

2019-11-11

Bug fixes

[CSHARP-817] - App.Metrics snapshot fails when timer metrics don't have any recorded values

Open source →

1.0.01 Jul 2013

Nothing published for this version

1.0.0-beta41 Jan 1900pre-releasewithdrawn

Nothing published for this version

1.0.0-beta31 Jan 1900pre-releasewithdrawn

Nothing published for this version

1.0.0-beta21 Jan 1900pre-releasewithdrawn

Nothing published for this version

1.0.0-beta113 Jun 2013pre-release

Nothing published for this version

0.9.113 Jun 2013

Nothing published for this version

3.4.0.116 Jan 2018

Nothing published for this version

3.1.0.124 Oct 2016

Nothing published for this version

Your coding agent can read these notes before it upgrades. Set up the MCP server →