Stable Release v5.1.0

Breaking changes

• Dropped support for .NET Core 3.1. #1704 #1823

Added

• Added support for .NET 6.0. #1704
• Added support for DateOnly and TimeOnly for SqlParameter value and GetFieldValue. #1813
• Added support for TLS 1.3 on .NET Core and native SNI. #1821
• Added ServerCertificate setting for Encrypt=Mandatory or Encrypt=Strict. #1822
• Added Windows ARM64 support when targeting .NET Framework. #1828

Fixed

• Fixed thread safety of transient error list in configurable retry logic. #1882
• Fixed deadlock when using SinglePhaseCommit with distributed transactions. #1801
• Fixed Dedicated Admin Connections (DAC) to localhost in managed SNI #1865
• Fixed memory leak regression from #1781 using a DisposableTemporaryOnStack struct. #1818
• Fixed ReadAsync() behavior to register Cancellation token action before streaming results. #1781
• Fixed NullReferenceException when assigning null to SqlConnectionStringBuilder.Encrypt. #1778
• Fixed missing HostNameInCertificate property in .NET Framework Reference Project. #1776
• Fixed async deadlock issue when sending attention fails due to network failure. #1766
• Fixed failed connection requests in ConnectionPool in case of PoolBlock. #1768
• Fixed hang on infinite timeout and managed SNI. #1742
• Fixed Default UTF8 collation conflict. #1739

Changed

• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to 5.1.0. #1889 which includes fix for AppDomain crash in issue #1418, TLS 1.3 Support, removal of ARM32 binaries, and support for the ServerCertificate option. #1822 Read more
• Reverted "Excluding unsupported TLS protocols" for issue #1151 (i.e. removed Switch.Microsoft.Data.SqlClient.EnableSecureProtocolsByOS) by adding support for TLS 1.3. #1824
• Changed the SqlConnectionEncryptOption string parser to public. #1771
• Converted ExecuteNonQueryAsync to use async context object. #1692
• Code health improvements #1867 #1849 #1812 #1520 #1604 #1598 #1595 #1443

For summary of all changes over v5.0, refer to 5.1.0.md

Preview Release 5.1.0-preview2.22314.2

[Preview Release 5.1.0-preview2.22314.2] - 2022-11-10

This update brings the below changes over the previous release:

Breaking changes over preview release v5.1.0-preview1

• Add support for .NET 6.0 and Dropped support for .NET Core 3.1. #1704 #1823

Added

• Added support for DateOnly and TimeOnly for SqlParameter value and GetFieldValue. #1813
• Added support for TLS 1.3 for .NET Core and SNI Native. #1821
• Added ServerCertificate support for Encrypt=Mandatory or Encrypt=Strict. #1822
• Added Windows ARM64 support when targeting .NET Framework. #1828

Fixed

• Fixed memory leak regression from #1781 using a DisposableTemporaryOnStack struct. #1818

Changed

• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to 5.1.0-preview2.22311.2. #1831 which includes the fix for the TLS 1.3 timeout and double handshake issue, removal of ARM32 binaries, and support for the ServerCertificate option. #1822
• Reverted "Excluding unsupported TLS protocols" for issue #1151 (i.e. removed Switch.Microsoft.Data.SqlClient.EnableSecureProtocolsByOS) by adding support for TLS 1.3. #1824
• Code health improvements #1812 #1520

For detailed release notes, refer to 5.1.0-preview2.md

Preview Release v5.1.0-preview1.22279.3

[Preview Release 5.1.0-preview1.22279.3] - 2022-10-19

This update brings the below changes over the stable release v5.0.0:

Fixed

• Fixed ReadAsync() behavior to register Cancellation token action before streaming results. #1781
• Fixed NullReferenceException when assigning null to SqlConnectionStringBuilder.Encrypt. #1778
• Fixed missing HostNameInCertificate property in .NET Framework Reference Project. #1776
• Fixed async deadlock issue when sending attention fails due to network failure. #1766
• Fixed failed connection requests in ConnectionPool in case of PoolBlock. #1768
• Fixed hang on infinite timeout and managed SNI. #1742
• Fixed Default UTF8 collation conflict. #1739

Changed

• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to 5.1.0-preview1.22278.1. #1787 which includes TLS 1.3 Support and fix for AppDomain crash in issue #1418
• Changed the SqlConnectionEncryptOption string parser to public. #1771
• Converted ExecuteNonQueryAsync to use async context object. #1692
• Code health improvements #1604 #1598 #1595 #1443

Known issues

• When using Encrypt=Strict with TLS v1.3, the TLS handshake occurs twice on initial connection on .NET Framework due to a timeout during the TLS handshake and a retry helper re-establishes the connection; however, on .NET Core, it will throw a System.ComponentModel.Win32Exception (258): The wait operation timed out. and is being investigated. If you're using Microsoft.Data.SqlClient with .NET Core on Windows 11, you will need to enable the managed SNI on Windows context switch using following statement AppContext.SetSwitch("Switch.Microsoft.Data.SqlClient.UseManagedNetworkingOnWindows", true); to use TLS v1.3 or disabling TLS 1.3 from the registry by assigning 0 to the following HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.3\Client\Enabled registry key and it'll use TLS v1.2 for the connection. This will be fixed in a future release.

For detailed release notes, refer to 5.1.0-preview1.md

Stable Release v5.0.1

Fixed

• Fixed missing HostNameInCertificate connection string property in .NET Framework. #1782
• Fixed async deadlock issue when sending attention fails due to network failure. #1783
• Fixed Null Reference Exception on assigning null to SqlConnectionStringBuilder.Encrypt. #1784
• Fixed ReadAsync() behavior to register Cancellation token action before streaming results. #1785
• Fixed hang on infinite timeout and managed SNI. #1798
• Fixed Default UTF8 collation conflict. #1799

Changed

• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to 5.0.1 #1795, which includes the fix for AppDomain crash in issue #1418.

Stable Release v4.1.1

[Stable release 4.1.1] - 2022-09-13

Fixed

• Fixed connection failure by not requiring Certificate Revocation List (CRL) check during authentication. #1706
• Parallelize SSRP requests on Linux and macOS when MultiSubNetFailover is specified. #1708, #1746
• Added CommandText length validation when using stored procedure command types. #1709
• Fixed NullReferenceException during Azure Active Directory authentication. #1710
• Fixed null SqlBinary as rowversion. #1712
• Fixed table's collation overriding with default UTF8 collation. #1749

Changed

• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to v4.0.1 #1755, which includes the fix for AppDomain crash introducing in issue #1418
• Various code improvements: #1711

Stable Release v4.0.2

[Stable release 4.0.2] - 2022-09-13

Fixed

• Fixed connection failure by not requiring Certificate Revocation List (CRL) check during authentication. #1718
• Parallelize SSRP requests on Linux and macOS when MultiSubNetFailover is specified. #1720, #1747
• Added CommandText length validation when using stored procedure command types. #1721
• Fixed NullReferenceException during Azure Active Directory authentication. #1722
• Fixed null SqlBinary as rowversion. #1724
• Fixed table's collation overriding with default UTF8 collation. #1750

Changed

• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to v4.0.1 #1754, which includes the fix for AppDomain crash introducing in issue #1418
• Various code improvements: #1723

Stable Release v3.1.1

[Stable release 3.1.1] - 2022-08-12

Fixed

• Fixed null SqlBinary as rowversion. #1700
• Fixed Kerberos authentication failure when using .NET 6. #1696
• Fixed NullReferenceException during Azure Active Directory authentication. #1695
• Removed union overlay design and use reflection in SqlTypeWorkarounds. #1699

Stable Release v2.1.5

[Stable release 2.1.5] - 2022-08-30

Fixed

• Added CommandText length validation when using stored procedure command types. #1726
• Fixed Kerberos authentication failure when using .NET 6. #1727
• Removed union overlay design and used reflection in SqlTypeWorkarounds. #1729

Stable Release v5.0.0

Added

• Added support for TDS 8. To use TDS 8, users should specify Encrypt=Strict in the connection string. #1608
• Added TDS 8 version for TDSLogin. #1657

Fixed

• Fixed null SqlBinary as rowversion. #1688
• Fixed KeyNotFoundException for the FailoverPartner key on SQL servers with availability group configured. #1614
• Fixed small inconsistency between netcore and netfx for EncryptionOptions. #1672
• Fixed Microsoft.SqlServer.Server netcore project package reference. #1654

Changed

• Updated AuthProviderInfo struct to be matched the changes in native SNI for TDS 8 server certificate validation. #1680
• Updated default system protocol for TDS 8 on managed code. #1678
• Updated Microsoft.Data.SqlClient.SNI (.NET Framework dependency) and Microsoft.Data.SqlClient.SNI.runtime (.NET Core/Standard dependency) version to 5.0.0. #1680
• Updated IdentityModel dependency from 6.8.0 to 6.21.0 and IdentityClient from 4.32.2 to 4.45.0. #1646
• Changed from union overlay design to reflected interfaces for SqlTypes. 1647

For summary of all changes over v4.1, refer to 5.0.0.md

Preview Release v5.0.0-preview3

[Preview Release 5.0.0-preview3.22168.1] - 2022-06-16

Breaking changes over preview release v5.0.0-preview2

• Added a dependency on the Microsoft.SqlServer.Server package. This new dependency may cause namespace conflicts if your application references that namespace and still has package references (direct or indirect) to System.Data.SqlClient from .NET Core.
• Dropped classes from the Microsoft.Data.SqlClient.Server namespace and replaced them with supported types from the Microsoft.SqlServer.Server package.#1585 The affected classes and enums are:
  • Microsoft.Data.SqlClient.Server.IBinarySerialize -> Microsoft.SqlServer.Server.IBinarySerialize
  • Microsoft.Data.SqlClient.Server.InvalidUdtException -> Microsoft.SqlServer.Server.InvalidUdtException
  • Microsoft.Data.SqlClient.Server.SqlFacetAttribute -> Microsoft.SqlServer.Server.SqlFacetAttribute
  • Microsoft.Data.SqlClient.Server.SqlFunctionAttribute -> Microsoft.SqlServer.Server.SqlFunctionAttribute
  • Microsoft.Data.SqlClient.Server.SqlMethodAttribute -> Microsoft.SqlServer.Server.SqlMethodAttribute
  • Microsoft.Data.SqlClient.Server.SqlUserDefinedAggregateAttribute -> Microsoft.SqlServer.Server.SqlUserDefinedAggregateAttribute
  • Microsoft.Data.SqlClient.Server.SqlUserDefinedTypeAttribute -> Microsoft.SqlServer.Server.SqlUserDefinedTypeAttribute
  • (enum) Microsoft.Data.SqlClient.Server.DataAccessKind -> Microsoft.SqlServer.Server.DataAccessKind
  • (enum) Microsoft.Data.SqlClient.Server.Format -> Microsoft.SqlServer.Server.Format
  • (enum) Microsoft.Data.SqlClient.Server.SystemDataAccessKind -> Microsoft.SqlServer.Server.SystemDataAccessKind

Added

• Added support for TDS 8. To use TDS 8, users should specify Encrypt=Strict in the connection string. Strict mode disables TrustServerCertificate (always treated as False in Strict mode). HostNameInCertificate has been added to help some Strict mode scenarios. #1608
• Added support for specifying Server SPN and Failover Server SPN on the connection. #1607
• Added support for aliases when targeting .NET Core on Windows. #1588

Fixed

• Fixed naming, order, and formatting for SqlDiagnosticsListener on .NET Core and .NET. [#1637] (#1637)
• Fixed NullReferenceException during Azure Active Directory authentication. [#1625] (#1625)
• Added CommandText length validation when using stored procedure command types. #1484
• Fixed GetSchema("StructuredTypeMembers") to return correct schema information. [#1500] (#1500), #1639
• Fixed NullReferenceException when using SqlDependency.Start against an Azure SQL Database.[#1294] (#1294)
• Send the correct retained transaction descriptor in the MARS TDS Header when there is no current transaction on .NET 5+ and .NET Core. [#1624] (#1624)
• Parallelize SSRP requests (instance name resolution) on Linux and macOS when MultiSubNetFailover is specified. [#1578] (#1578)
• Adjust the default ConnectRetryCount against Azure Synapse OnDemand endpoints [#1626] (#1626)

Changed

• Dropped the Microsoft.Data.SqlClient.Server namespace and replaced it with supported types from the Microsoft.SqlServer.Server package.#1585
• Code health improvements #1353 #1354 #1525 #1186
• Update Azure Identity dependency from 1.5.0 to 1.6.0.#1611
• Improved Regex for SqlCommandSet [#1548] (#1548)
• Rework on TdsParserStateObjectManaged with nullable annotations. [#1555] (#1555)

For detailed release notes, refer 5.0.0-preview3.md