Hotfix & Stable Release v2.1.1

Fixed

• Fixed issue with System-Assigned Managed Identity in Azure Functions #841
• Fixed issue with Kerberos Authentication for .NET Core in Unix environments #848
• Fixed issue with TCP Keep Alive for .NET Core in Unix environments #855

[AzureKeyVaultProvider] Stable Release v1.2.0

Changes

• Added support for .NET Standard 2.0. This requires Microsoft.Data.SqlClient v2.1.0 and above. #823
• Added new HSM endpoints. #750
• Added source linked PDBs for easier debugging of the package. #789

Stable Release v2.1.0

Added

• Microsoft.Data.SqlClient symbols are now source-linked #789
• Added an API to clear cached access tokens from the token provider #800
• Added SqlFacetAttribute implementation #757

Fixed

• Fixed InvalidOperationException and NotSupportedException errors due to WriteAsync collisions #796
• Fixed incorrect Settings.Async flag in ExecuteXmlReaderAsync #782
• Fixed a regression in Windows Integrated authentication when using managed networking #777
• Fixed Bulk Copy Async deadlock issues with custom IDataReader when using SqlDataReader internally #779
• Fixed a serialization issue with SqlException in .NET Core #780

Changes

• Updated versions of Microsoft.IdentityModel package dependencies #794

For summary of all changes over v2.0, refer 2.1.0.md

Preview Release v2.1.0-preview2.20297.7

Added

• Added support for Azure Active Directory Managed Identity authentication #730
• Added support to provide a user-defined application client ID when using Active Directory authentication #740
• Added the "Command Timeout" connection string property to set a default timeout for all commands executed with the connection #722
• Added support for Always Encrypted on all supported platforms for .NET Standard 2.0 #756

Fixed

• Fixed unobserved exception issue when a timeout occurs before a faulted task completes with an exception #688 #773
• Fixed an issue where driver continues to prompt for credentials when using Azure Active Directory authentication #770

Changes

• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to v2.1.1 and removed symbols from Microsoft.Data.SqlClient.SNI.runtime, which are now published to Microsoft Symbols Server #764
• Updated Microsoft.Identity.Client dependency version to v4.21.1 #765
• Performance improvements when establishing an encrypted channel by removing sync over async method calls #541
• Performance improvements by replacing heap-allocated arrays with Spans #667
• Moved common files to shared folder between .NET Framework and .NET Core implementation #734 #753

For detailed release notes, see 2.1.0-preview2.md

Hotfix & Stable Release v2.0.1

Added

• Added support for a new Configuration Section, SqlClientAuthenticationProviders (duplicate of existing SqlAuthenticationProviders), to allow co-existence of configurations for both drivers, "System.Data.SqlClient" and "Microsoft.Data.SqlClient" #701

Fixed

• Fixed pooled connection re-use on access token expiry issue when using Active Directory authentication modes #639
• Fixed transient fault handling for Pooled connections #638
• Fixed Enclave session cache issue with Azure Database #628
• Reverted changes to return empty DataTable from GetSchemaTable to return null as before. #697
• Fixed configuration section collision issue with System.Data.SqlClient type #701
• Fixed blank error message [HTTP Provider] issues due to unexpected pre-login failures when using Native SNI. Fixed with Microsoft.Data.SqlClient.SNI v2.0.1 and Microsoft.Data.SqlClient.SNI.runtime v2.0.1 release versions.

Preview Release v2.1.0-preview1.20235.1

Added

• Added support for Always Encrypted with secure enclaves on Unix for .NET Core 2.1+ and on all supported platforms for .NET Standard 2.1+ #676
• Added support for Azure Active Directory Device Code Flow authentication #597
• Added new APIs to enable customizations for "Active Directory Interactive" authentication experience #597
• Added Sensitivity Rank support in Sensitivity Classification information #626
• Added support to obtain ServerProcessId() (SPID) information on an active SqlConnection instance #660
• Added support for a new Configuration Section, SqlClientAuthenticationProviders (duplicate of existing SqlAuthenticationProviders), to allow co-existence of configurations for both drivers, "System.Data.SqlClient" and "Microsoft.Data.SqlClient" #702
• Added TraceLogging in Native SNI to extend SqlClientEventSource support #650
• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to v2.1.0 with trace logging implementation #705

Fixed

• Fixed Enclave session cache issue with Azure Database #686
• Fixed pooled connection re-use on access token expiry issue when using Active Directory authentication modes #635
• Fixed transient fault handling for Pooled connections #637
• Fixed SPN generation issue when no port is provided #629
• Fixed missing null checks for SqlErrors in SqlException for .NET Framework implementation #698

Changes

• Performance improvements by fixing unnecessary allocations with EventSource implementation #684
• Reverted changes to return empty DataTable from GetSchemaTable to return null as before. #696
• Removed multiple CacheConnectionStringProperties calls when setting ConnectionString properties #683
• Code Improvements by only checking inexact match when no exact match is found for an embedded resource #668
• Changed _SqlMetaData to lazy initialize hidden column map #521
• Renamed internal string resource file and helpers for .NET Core implementation #671
• Performance improvements by reworking ExecuteReaderAsync to minimize allocations #528
• Performance improvements by moving DataReader caches to internal connection #499
• Moved common files to shared folder between .NET Framework and .NET Core implementation #618 #625

Stable Release v2.0.0

Added

• Added internal driver support to provide resiliency to DNS failures #594
• Added support for Active Directory Integrated, Active Directory Interactive and Active Directory Service Principal authentication mode for .NET Core and .NET Standard #560
• Added support for Active Directory Service Principal authentication mode for .NET Framework #560
• Added support for optional ORDER hints in SqlBulkCopy for improved performance #540

Fixed

• Fixed SqlSequentialStream multipacket read stalling issue in .NET Core #603
• Fixed code page issue for Kazakh collation in SQL Server #584
• Fixed stalled application issues when end of stream is reached #577
• Fixed driver behavior to not throw exception for invalid configuration file #573
• Fixed Object null reference issue when failover partner is set #588
• Fixed applicationintent connection string property issue #585

Changes

• Raise warning message when insecure TLS protocols are in use #591

Breaking Changes

• Modified enclave provider interface SqlColumnEncryptionEnclaveProvider to be internal #602 - This change is not likely to impact customer applications since secure enclaves is a relatively new feature and they would have had to implement their own enclave provider, which is not a trivial task.
• Updated SqlClientMetaDataCollectionNames exposed constants by removing non-existing constants and adding new to the metadata collection #580

For summary of all changes over v1.1, refer 2.0.0.md

Preview Release v2.0.0-preview4.20142.4

Added

• Microsoft.Data.SqlClient (.NET Core and .NET Standard) on Windows is now dependent on Microsoft.Data.SqlClient.SNI.runtime, replacing the previous dependency on runtime.native.System.Data.SqlClient.SNI #570
• The new Microsoft.Data.SqlClient.SNI.runtime dependency adds support for the ARM platform along with the already supported platforms ARM64, x64 and x86 on Windows #570
• Improved driver performance by introducing managed packet recycling #389

Fixed

• Fixed SqlBulkCopy to work with database columns containing metadata about data classification #568
• Fixed unsafe cast in SqlException for SerializationEntry.Value
• Fixed null reference exceptions in SqlDelegatedTransaction methods #563

Changes

• Standardized connection string properties for enhanced user experience #534
• Improved performance by reducing eventsource tracing related to allocations from TVP write methods #557 #564

Breaking Changes

• For .NET Framework applications consuming Microsoft.Data.SqlClient, the SNI.dll files previously downloaded to the bin\x64 and bin\x86 folders are now named Microsoft.Data.SqlClient.SNI.x64.dll and Microsoft.Data.SqlClient.SNI.x86.dll and will be downloaded to the bin directory, to support auto-loading in the application process #570. This change is not going to impact client applications unless a direct reference has been made to SNI.dll or the x86 and x64 folders.
• New connection string synonyms replace old inconsistent properties when fetching connection string from SqlConnectionStringBuilder #534

For detailed release notes, refer 2.0.0-preview4.md

Hotfix & Stable Release v1.1.3

Fixed

• Fixed driver behavior to not perform enlistment of pooled connection in aborted transaction #551
• Fixed issues introduced with MARS TDS Header fix in last release by reverting original change that caused issues. #550

Preview Release v2.0.0-preview3.20122.2

Added

• Allow passing username with Active Directory Interactive Authentication in .NET Framework #492
• Allow large UDT buffers for .NET Framework #456
• Added "Transaction Id" and "Client Version" in Diagnostic Source traces #515
• Added new SqlConnectionOverrides APIs to perform SqlConnection.Open() with fail fast option #463

Fixed

• Addressed MARS TDS Header errors by reverting changes to make SqlDataReader.ReadAsync() non-blocking #547
• Fixed driver behavior to not perform enlistment of pooled connection in aborted transaction #543
• Fixed wrong application domain selected when starting SqlDependencyListener #410
• Added missing refs for RowCopied property in SqlBulkCopy #508

Changes

• Improved performance by removing unwanted method calls in Event Source tracing #506
• Removed Diagnostic Source and Configuration Manager dependencies from .NET Standard implementation #535
• Removed redundant calls to DbConnectionPoolKey.GetType() #512

Breaking Changes

• Updated driver to perform decimal scale rounding to match SQL Server behavior #470
• Standardized App Context switch that enables Managed SNI on Windows for .NET Core and .NET Standard (break only applies to 2.0 preview releases that introduced the switch) #548

For more details and breaking changes, refer here