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‎.azuredevops/policies/approvercountpolicy.yml

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# This file configures the Approver Count Policy Validator status check. Some
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# settings here are similar to branch policies specified via the Azure DevOps UI
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# that govern how PRs are approved in general. The settings here dictate how
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# the validator behaves, and it can also prevent PRs from completing.
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#
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# Suggested by Merlinbot (https://sqlclientdrivers.visualstudio.com/ADO.Net/_git/dotnet-sqlclient/pullrequest/4982)
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name: approver_count
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description: Approver count policy for dotnet-sqlclient
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resource: repository
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where:
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configuration:
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approverCountPolicySettings:
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isBlocking: true
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requireMinimumApproverCount: 2
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creatorVoteCounts: false
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allowDownvotes: false
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sourcePushOptions:
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resetOnSourcePush: false
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requireVoteOnLastIteration: true
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requireVoteOnEachIteration: false
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resetRejectionsOnSourcePush: false
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blockLastPusherVote: true
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branchNames:
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- refs/heads/internal/main
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- refs/heads/internal/release/6.0
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- refs/heads/internal/release/5.2
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- refs/heads/internal/release/5.1
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displayName: dotnet-sqlclient Approver Count Policy

‎.editorconfig

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csharp_space_between_parentheses = false
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csharp_space_between_square_brackets = false
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# Xml project files
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# Analyzers
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dotnet_code_quality.ca1802.api_surface = private, internal
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# CA2000: Dispose objects before losing scope
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dotnet_diagnostic.CA2000.severity = suggestion
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# CA1063: Implement IDisposable Correctly
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dotnet_diagnostic.CA1063.severity = silent
@@ -143,6 +148,10 @@ dotnet_diagnostic.CA2100.severity = silent
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# CA1416: Validate platform compatibility
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dotnet_diagnostic.CA1416.severity = silent
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dotnet_code_quality.CA2100.excluded_type_names_with_derived_types = Microsoft.Data.SqlClient.ManualTesting.Tests.*
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dotnet_diagnostic.xUnit1031.severity=none
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dotnet_diagnostic.xUnit1030.severity=none
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[*.{csproj,vcxproj,vcxproj.filters,proj,nativeproj,locproj}]
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indent_size = 2
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end_of_line = lf
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[*.{cmd, bat}]
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end_of_line = crlf
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# Analyzers
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dotnet_code_quality.ca1802.api_surface = private, internal
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[*.cs]
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dotnet_code_quality.CA2100.excluded_type_names_with_derived_types = Microsoft.Data.SqlClient.ManualTesting.Tests.*
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dotnet_diagnostic.xUnit1031.severity=none
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dotnet_diagnostic.xUnit1030.severity=none
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‎CHANGELOG.md

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# Release Notes
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## [Preview Release 6.1.0-preview2.25178.5] - 2025-06-27
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This update brings the following changes since the [6.1.0-preview1](release-notes/6.1/6.1.0-preview1.md) release:
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### Added
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#### Added dedicated SQL Server vector datatype support
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*What Changed:*
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- Optimized vector communications between MDS and SQL Server 2025, employing a
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custom binary format over the TDS protocol.
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([#3433](https://github.com/dotnet/SqlClient/pull/3433),
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[#3443](https://github.com/dotnet/SqlClient/pull/3443))
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- Reduced processing load compared to existing JSON-based vector support.
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- Initial support for 32-bit single-precision floating point vectors.
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*Who Benefits:*
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- Applications moving large vector data sets will see beneficial improvements
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to processing times and memory requirements.
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- Vector-specific APIs are ready to support future numeric representations with
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a consistent look-and-feel.
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*Impact:*
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- Reduced transmission and processing times for vector operations versus JSON
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using SQL Server 2025 preview:
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- Reads: 50x improvement
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- Writes: 3.3x improvement
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- Bulk Copy: 19x improvement
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- (Observed with vector column of max 1998 size, and 10,000 records for each
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operation.)
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- Improved memory footprint due to the elimination of JSON
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serialization/deserialization and string representation bloat.
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- For backwards compatibility with earlier SQL Server Vector implementations,
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applications may continue to use JSON strings to send/receive vector data,
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although they will not see any of the performance improvements noted above.
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#### Revived .NET Standard 2.0 target support
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*What Changed:*
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- Support for targeting .NET Standard 2.0 has returned.
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([#3381](https://github.com/dotnet/SqlClient/pull/3381))
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- Support had previously been removed in the 6.0 release, with the
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[community voicing concerns](https://github.com/dotnet/SqlClient/discussions/3115).
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*Who Benefits:*
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- Libraries that depend on MDS may seamlessly target any of the following
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frameworks:
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- .NET Standard 2.0
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- .NET Framework 4.6.2 and above
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- .NET 8.0
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- .NET 9.0
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- Applications should continue to target runtimes.
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- The MDS .NET Standard 2.0 target framework support does not include an
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actual implementation, and cannot be used with a runtime.
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- An application's build/publish process should always pick the appropriate
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MDS .NET/.NET Framework runtime implementation.
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- Custom build/publish actions that incorrectly try to deploy the MDS .NET
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Standard 2.0 reference DLL at runtime are not supported.
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*Impact:*
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- Libraries targeting .NET Standard 2.0 will no longer receive warnings like
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this:
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- `warning NU1701: Package 'Microsoft.Data.SqlClient 6.0.2' was restored using '.NETFramework,Version=v4.6.1, .NETFramework,Version=v4.6.2, .NETFramework,Version=v4.7, .NETFramework,Version=v4.7.1, .NETFramework,Version=v4.7.2, .NETFramework,Version=v4.8, .NETFramework,Version=v4.8.1' instead of the project target framework '.NETStandard,Version=v2.0'. This package may not be fully compatible with your project.`
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### Fixed
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- Fixed missing <NeutralLanguage> property.
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([#3325](https://github.com/dotnet/SqlClient/pull/3325))
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- Fixed injection of UTF-8 BOM during bulk copy.
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([#3399](https://github.com/dotnet/SqlClient/pull/3399))
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- Fixed `SqlCachedBuffer` async read edge case.
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([#3329](https://github.com/dotnet/SqlClient/pull/3329))
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- Fixed `SqlSequentialTextReader` edge case with single-byte reads.
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([#3383](https://github.com/dotnet/SqlClient/pull/3383))
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- Fixed an incorrect error message when parsing connection string `PoolBlockingPeriod`.
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([#3411](https://github.com/dotnet/SqlClient/pull/3411))
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- Added missing `ToString()` override to `SqlJson`.
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([#3427](https://github.com/dotnet/SqlClient/pull/3427))
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### Changed
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- Reduced allocations when opening a connection.
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([#3364](https://github.com/dotnet/SqlClient/pull/3364))
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- Various performance improvements related to TDS parsing.
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([#3337](https://github.com/dotnet/SqlClient/pull/3337),
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[#3377](https://github.com/dotnet/SqlClient/pull/3377),
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[#3422](https://github.com/dotnet/SqlClient/pull/3422))
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- Improved native AOT support.
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([#3364](https://github.com/dotnet/SqlClient/pull/3364),
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[#3369](https://github.com/dotnet/SqlClient/pull/3369),
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[#3401](https://github.com/dotnet/SqlClient/pull/3401))
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- Progress towards [SSPI extensibility](https://github.com/dotnet/SqlClient/issues/2253).
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([#2454](https://github.com/dotnet/SqlClient/pull/2454))
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- Progress towards [connection pooling improvements](https://github.com/dotnet/SqlClient/issues/3356).
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([#3352](https://github.com/dotnet/SqlClient/pull/3352),
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[#3396](https://github.com/dotnet/SqlClient/pull/3396))
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- Expanded/clarified SqlConnection's
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[AccessToken](https://learn.microsoft.com/en-us/dotnet/api/microsoft.data.sqlclient.sqlconnection.accesstoken) and
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[AccessTokenCallback](https://learn.microsoft.com/en-us/dotnet/api/microsoft.data.sqlclient.sqlconnection.accesstokencallback)
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documentation.
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([#3339](https://github.com/dotnet/SqlClient/pull/3339))
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- Fixed some poorly formatted tables in the API docs.
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([#3391](https://github.com/dotnet/SqlClient/pull/3391))
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- Code merge towards a unified SqlClient project, aligning .NET Framework and
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.NET Core implementations.
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([#3262](https://github.com/dotnet/SqlClient/pull/3262),
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[#3291](https://github.com/dotnet/SqlClient/pull/3291),
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[#3305](https://github.com/dotnet/SqlClient/pull/3305),
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[#3306](https://github.com/dotnet/SqlClient/pull/3306),
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[#3310](https://github.com/dotnet/SqlClient/pull/3310),
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[#3323](https://github.com/dotnet/SqlClient/pull/3323),
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[#3326](https://github.com/dotnet/SqlClient/pull/3326),
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[#3335](https://github.com/dotnet/SqlClient/pull/3335),
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[#3338](https://github.com/dotnet/SqlClient/pull/3338),
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[#3340](https://github.com/dotnet/SqlClient/pull/3340),
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[#3341](https://github.com/dotnet/SqlClient/pull/3341),
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[#3343](https://github.com/dotnet/SqlClient/pull/3343),
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[#3345](https://github.com/dotnet/SqlClient/pull/3345),
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[#3353](https://github.com/dotnet/SqlClient/pull/3353),
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[#3355](https://github.com/dotnet/SqlClient/pull/3355),
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[#3368](https://github.com/dotnet/SqlClient/pull/3368),
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[#3373](https://github.com/dotnet/SqlClient/pull/3373),
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[#3376](https://github.com/dotnet/SqlClient/pull/3376),
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[#3388](https://github.com/dotnet/SqlClient/pull/3388),
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[#3389](https://github.com/dotnet/SqlClient/pull/3389),
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[#3393](https://github.com/dotnet/SqlClient/pull/3393),
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[#3405](https://github.com/dotnet/SqlClient/pull/3405),
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[#3414](https://github.com/dotnet/SqlClient/pull/3414),
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[#3416](https://github.com/dotnet/SqlClient/pull/3416),
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[#3417](https://github.com/dotnet/SqlClient/pull/3417),
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[#3420](https://github.com/dotnet/SqlClient/pull/3420),
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[#3431](https://github.com/dotnet/SqlClient/pull/3431),
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[#3438](https://github.com/dotnet/SqlClient/pull/3438))
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- Test improvements include a new unit test project, updates to test
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dependencies, removal of hardcoded credentials, and improved robustness.
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([#3204](https://github.com/dotnet/SqlClient/pull/3204),
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[#3379](https://github.com/dotnet/SqlClient/pull/3379),
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[#3380](https://github.com/dotnet/SqlClient/pull/3380),)
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[#3402](https://github.com/dotnet/SqlClient/pull/3402)
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- Added dependency on `System.Text.Json`
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[8.0.5](https://www.nuget.org/packages/System.Text.Json/8.0.5) (.NET 8.0) and
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[9.0.5](https://www.nuget.org/packages/System.Text.Json/9.0.5) (.NET Standard 2.0, .NET 9.0)
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to avoid transitive vulnerabilities ([CVE-2024-43485](https://github.com/advisories/GHSA-8g4q-xg66-9fp4)).
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([#3403](https://github.com/dotnet/SqlClient/pull/3403))
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## [Preview Release 6.1.0-preview1.25120.4] - 2025-04-30
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This update brings the following changes over the previous release:
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### Added
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- Added packet multiplexing support to improve large data read performance. [#2714](https://github.com/dotnet/SqlClient/pull/2714) [#3161](https://github.com/dotnet/SqlClient/pull/3161) [#3202](https://github.com/dotnet/SqlClient/pull/3202)
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- Added support for special casing with Fabric endpoints. [#3084](https://github.com/dotnet/SqlClient/pull/3084)
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### Fixed
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- Fixed distributed transactions to be preserved during pooled connection resets. [#3019](https://github.com/dotnet/SqlClient/pull/3019).
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- Fixed application crash when the `Data Source` parameter begins with a comma. [#3250](https://github.com/dotnet/SqlClient/pull/3250).
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- Resolved synonym count discrepancies in debug mode. [#3098](https://github.com/dotnet/SqlClient/pull/3098).
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- Addressed warnings for down-level SSL/TLS versions. [#3126](https://github.com/dotnet/SqlClient/pull/3126).
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### Changed
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- Optimized binary size for AOT. [#3091](https://github.com/dotnet/SqlClient/pull/3091)
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- Refined bulk copy operations to handle unmatched column names more effectively. [#3205](https://github.com/dotnet/SqlClient/pull/3205).
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- Enhanced `SqlBulkCopy` to explicitly identify mismatched column names. [#3183](https://github.com/dotnet/SqlClient/pull/3183).
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- Optimized outgoing SSPI blob handling using `IBufferWriter<byte>`. [#2452](https://github.com/dotnet/SqlClient/pull/2452).
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- Replaced `byte[]` with `string` for SNI to improve efficiency. [#2790](https://github.com/dotnet/SqlClient/pull/2790).
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- Code cleanup to remove SQL 2000 support. [#2839](https://github.com/dotnet/SqlClient/pull/2839), [#3206](https://github.com/dotnet/SqlClient/pull/3206), [#3217](https://github.com/dotnet/SqlClient/pull/3217)
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- Connection pool design refactor for a modular connection pool design. [#3199](https://github.com/dotnet/SqlClient/pull/3199)
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- Updated various dependencies [#3229](https://github.com/dotnet/SqlClient/pull/3229), primarily:
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- System.Text.Encodings.Web to v8.0.0
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- System.Text.Json to v8.0.5
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- Azure.Identity to v1.13.2
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- Microsoft.Identity.Model.Json.Web.Tokens to v7.7.1
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- Microsoft.Identity.Model.Protocols.OpenIdConnect to v7.7.1
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- Code merge towards a unified SqlClient project, aligning .NET Framework and .NET Core implementations. ([#2957](https://github.com/dotnet/sqlclient/pull/2957), [#2963](https://github.com/dotnet/sqlclient/pull/2963), [#2984](https://github.com/dotnet/sqlclient/pull/2984), [#2982](https://github.com/dotnet/sqlclient/pull/2982), [#3023](https://github.com/dotnet/sqlclient/pull/3023), [#3015](https://github.com/dotnet/sqlclient/pull/3015), [#2967](https://github.com/dotnet/sqlclient/pull/2967), [#3164](https://github.com/dotnet/sqlclient/pull/3164), [#3163](https://github.com/dotnet/sqlclient/pull/3163), [#3171](https://github.com/dotnet/sqlclient/pull/3171), [#3182](https://github.com/dotnet/sqlclient/pull/3182), [#3179](https://github.com/dotnet/sqlclient/pull/3179), [#3156](https://github.com/dotnet/sqlclient/pull/3156), [#3213](https://github.com/dotnet/sqlclient/pull/3213), [#3232](https://github.com/dotnet/sqlclient/pull/3232), [#3236](https://github.com/dotnet/sqlclient/pull/3236), [#3231](https://github.com/dotnet/sqlclient/pull/3231), [#3241](https://github.com/dotnet/sqlclient/pull/3241), [#3246](https://github.com/dotnet/sqlclient/pull/3246), [#3247](https://github.com/dotnet/sqlclient/pull/3247), [#3222](https://github.com/dotnet/sqlclient/pull/3222), [#3255](https://github.com/dotnet/sqlclient/pull/3255), [#3254](https://github.com/dotnet/sqlclient/pull/3254), [#3259](https://github.com/dotnet/sqlclient/pull/3259), [#3264](https://github.com/dotnet/sqlclient/pull/3264), [#3256](https://github.com/dotnet/sqlclient/pull/3256), [#3251](https://github.com/dotnet/sqlclient/pull/3251), [#3275](https://github.com/dotnet/sqlclient/pull/3275), [#3277](https://github.com/dotnet/sqlclient/pull/3277), [#3263](https://github.com/dotnet/sqlclient/pull/3263), [#3292](https://github.com/dotnet/sqlclient/pull/3292), [#3208](https://github.com/dotnet/sqlclient/pull/3208)).
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- Test improvements include updates to test references, removal of hardcoded certificates, improved stability, and better coverage ([#3041](https://github.com/dotnet/sqlclient/pull/3041), [#3034](https://github.com/dotnet/sqlclient/pull/3034), [#3130](https://github.com/dotnet/sqlclient/pull/3130), [#3128](https://github.com/dotnet/sqlclient/pull/3128), [#3181](https://github.com/dotnet/sqlclient/pull/3181), [#3060](https://github.com/dotnet/sqlclient/pull/3060), [#3184](https://github.com/dotnet/sqlclient/pull/3184), [#3033](https://github.com/dotnet/sqlclient/pull/3033), [#3186](https://github.com/dotnet/sqlclient/pull/3186), [#3025](https://github.com/dotnet/sqlclient/pull/3025), [#3230](https://github.com/dotnet/sqlclient/pull/3230), [#3237](https://github.com/dotnet/sqlclient/pull/3237), [#3059](https://github.com/dotnet/sqlclient/pull/3059), [#3061](https://github.com/dotnet/sqlclient/pull/3061)).
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## [Stable release 6.0.2] - 2025-04-25
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This update brings the below changes over the previous release:
@@ -17,11 +202,12 @@ This update brings the below changes over the previous release:
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- Fixed an error reading the output parameter of type JSON while executing stored procedure [#3173](https://github.com/dotnet/SqlClient/pull/3173)
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### Changed
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20206
- Updated the below dependencies:
21-
- Updated [Microsoft.Bcl.Cryptography](https://www.nuget.org/packages/Microsoft.Bcl.Cryptography/9.0.4) from 9.0.0 to 9.0.4 for .NET 9 targeted dll. [#3281](https://github.com/dotnet/SqlClient/pull/3281)
22-
- Updated [Microsoft.Extensions.Caching.Memory](https://www.nuget.org/packages/Microsoft.Extensions.Caching.Memory/9.0.4) from 9.0.0 to 9.0.4 for .NET 9 targeted dll. [#3281](https://github.com/dotnet/SqlClient/pull/3281)
23-
- Updated [System.Configuration.ConfigurationManager](https://www.nuget.org/packages/System.Configuration.ConfigurationManager/9.0.4) from 9.0.0 to 9.0.4 for .NET 9 targeted dll. [#3281](https://github.com/dotnet/SqlClient/pull/3281)
24-
- Updated [System.Security.Cryptography.Pkcs](https://www.nuget.org/packages/System.Security.Cryptography.Pkcs/9.0.4) from 9.0.0 to 9.0.4 for .NET 9 targeted dll. [#3281](https://github.com/dotnet/SqlClient/pull/3281)
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- Updated [Microsoft.Bcl.Cryptography](https://www.nuget.org/packages/Microsoft.Bcl.Cryptography/9.0.4) from 9.0.0 to 9.0.4 for .NET 9 targeted dll. [#3281](https://github.com/dotnet/SqlClient/pull/3281)
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- Updated [Microsoft.Extensions.Caching.Memory](https://www.nuget.org/packages/Microsoft.Extensions.Caching.Memory/9.0.4) from 9.0.0 to 9.0.4 for .NET 9 targeted dll. [#3281](https://github.com/dotnet/SqlClient/pull/3281)
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- Updated [System.Configuration.ConfigurationManager](https://www.nuget.org/packages/System.Configuration.ConfigurationManager/9.0.4) from 9.0.0 to 9.0.4 for .NET 9 targeted dll. [#3281](https://github.com/dotnet/SqlClient/pull/3281)
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- Updated [System.Security.Cryptography.Pkcs](https://www.nuget.org/packages/System.Security.Cryptography.Pkcs/9.0.4) from 9.0.0 to 9.0.4 for .NET 9 targeted dll. [#3281](https://github.com/dotnet/SqlClient/pull/3281)
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## [Stable release 6.0.1] - 2025-01-23
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