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paulmedynski merged 9 commits into from
Sep 18, 2026
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[v7.1.0] Release Notes #4699

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63b1ea6
[v7.1.0] Release Notes
paulmedynski Sep 16, 2026
e02453d
Update 7.1.0 release date
paulmedynski Sep 17, 2026
cf528d0
Address 7.1.0 release notes feedback
paulmedynski Sep 18, 2026
f698aef
Clarify stable SNI release notes
paulmedynski Sep 18, 2026
467950e
Add SNI dependency entry to 7.1.0 changelog
paulmedynski Sep 18, 2026
2158337
Correct release note accuracy issues for 7.1.0
paulmedynski Sep 18, 2026
98ceaf1
Qualify RegisteredApplication default and AKV cache gating
paulmedynski Sep 18, 2026
fa05786
Correct telemetry, servicing, and compatibility statements for 7.1.0
paulmedynski Sep 18, 2026
27ad302
Drop routine localization entries from the 7.1.0 notes
paulmedynski Sep 18, 2026
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50 changes: 49 additions & 1 deletion CHANGELOG.md
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Expand Up @@ -6,8 +6,56 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)

> **Note:** Releases are sorted in reverse chronological order (newest first).

## [Stable Release 7.1.0] - 2026-09-17

General availability of Microsoft.Data.SqlClient 7.1. The sections below list the changes since [7.1.0-preview3](release-notes/7.1/7.1.0-preview3.md). See the [7.1.0 release notes](release-notes/7.1/7.1.0.md) for the cumulative list of changes since the 7.0.3 stable release.

### Added

- Added a `RegisteredApplication` enum and a matching `SqlConnection.RegisteredApplication` property that let a library or tool identify itself to SQL Server through version 2 of the TDS USERAGENT feature extension. The payload also carries a new driver-owned 64-bit *Driver Properties* flag field; bit 0 reports whether connection pool V2 is enabled for the process. Application identity is client-supplied telemetry and must never be used for authorization or any other security decision. The value must be set before `Open`/`OpenAsync` and is not part of the connection pool key.
([#3201](https://github.com/dotnet/SqlClient/issues/3201), [#4632](https://github.com/dotnet/SqlClient/pull/4632))

### Changed
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- `SqlConnectionStringBuilder.TransparentNetworkIPResolution` is now marked `[Obsolete]`, directing callers to `MultiSubnetFailover`. There is no runtime behavior change: connection string defaults are untouched and no new AppContext switches were introduced. The only visible effect is a `CS0618` build warning for code that references the property.
([#4494](https://github.com/dotnet/SqlClient/issues/4494), [#4576](https://github.com/dotnet/SqlClient/pull/4576))

- Unified the exception message raised when conflicting token-based and SSPI authentication properties are set on the same `SqlConnection`, and documented the complete set of properties that conflict with `AccessToken`.
([#4629](https://github.com/dotnet/SqlClient/pull/4629))

- Documentation corrections for `SqlDataRecord`, `SqlMetaData`, and the LCID 1033 locale name.
([#1805](https://github.com/dotnet/SqlClient/issues/1805),
[#4440](https://github.com/dotnet/SqlClient/pull/4440),
[#4646](https://github.com/dotnet/SqlClient/pull/4646))

- Updated `Microsoft.Data.SqlClient.SNI` and `Microsoft.Data.SqlClient.SNI.runtime` to v7.1.0 (was v7.1.0-preview3.26226.3).
([#4698](https://github.com/dotnet/SqlClient/pull/4698))

### Fixed

- Fixed a pooled connection being returned to the pool in a broken state after a `TransactionScope` rollback — for example, when distributed transaction promotion fails on .NET 8+ where implicit distributed transactions are disabled by default. Connection reset now preserves the transaction when the pooled connection is either a delegated transaction root or enlisted in a transaction.
([#4001](https://github.com/dotnet/SqlClient/issues/4001), [#4557](https://github.com/dotnet/SqlClient/pull/4557))

- Fixed `GetSchema("DataTypes")` never reporting the SQL Server 2025 `json` type against Azure SQL. The decision now uses the `json` support flag negotiated through the TDS `FEATUREEXTACK` token instead of a server version string comparison.
([#4592](https://github.com/dotnet/SqlClient/issues/4592), [#4682](https://github.com/dotnet/SqlClient/pull/4682))

- Fixed a malformed UNC pipe path being composed for IPv6 literal server names over Named Pipes in managed SNI, which could trigger an access violation inside LSASS on Windows and force a reboot. IPv6 literals are now transcribed to their `.ipv6-literal.net` form. (net8.0/net9.0 only)
([#4523](https://github.com/dotnet/SqlClient/issues/4523), [#4558](https://github.com/dotnet/SqlClient/pull/4558))

- Fixed configurable retry logic installing a permanent, process-wide assembly-resolution handler that could interfere with unrelated assembly loading. The handler is now installed only while an explicitly configured custom retry provider is resolved and constructed, and probes `AppContext.BaseDirectory` instead of the current working directory. (net8.0/net9.0 only)
([#2214](https://github.com/dotnet/SqlClient/issues/2214), [#4547](https://github.com/dotnet/SqlClient/pull/4547))

- Fixed open/close throughput regressions in the opt-in connection pool V2 (`Switch.Microsoft.Data.SqlClient.UseConnectionPoolV2`). The default pool is unaffected.
([#4543](https://github.com/dotnet/SqlClient/pull/4543))

### Companion packages

- Released `Microsoft.Data.SqlClient.Extensions.Azure` 7.1.0 with an internal Entra ID authority parsing clarification and no behavior change. See [release notes](release-notes/Extensions/Azure/7.1/7.1.0.md).
- Released version-aligned `Microsoft.Data.SqlClient.AlwaysEncrypted.AzureKeyVaultProvider`, `Microsoft.Data.SqlClient.Extensions.Abstractions`, and `Microsoft.Data.SqlClient.Internal.Logging` 7.1.0 with no functional or API changes since preview3. See the [Azure Key Vault provider](release-notes/add-ons/AzureKeyVaultProvider/7.1/7.1.0.md), [Abstractions](release-notes/Extensions/Abstractions/7.1/7.1.0.md), and [Logging](release-notes/Internal/Logging/7.1/7.1.0.md) release notes.

## [Stable Release 7.0.3] - 2026-09-10


### Changed

- Updated the `Microsoft.Data.SqlClient.SNI` and `Microsoft.Data.SqlClient.SNI.runtime` dependencies to 6.0.3 (was 6.0.2).
Expand Down Expand Up @@ -227,7 +275,7 @@ See the [full release notes](release-notes/7.1/7.1.0-preview2.md) for detailed d
- `SqlVector<float>` now serializes and deserializes multibyte values as little-endian explicitly.
([#3861](https://github.com/dotnet/SqlClient/pull/3861))

- Updated the bundled .NET 10 SDK to `10.0.300`.
- Updated the .NET 10 SDK used to build the repository to `10.0.300`.
([#4287](https://github.com/dotnet/SqlClient/pull/4287))

- Re-shipped `Microsoft.Data.SqlClient.Extensions.Azure` as `7.1.0-preview2`, adding Windows Account Manager (WAM) broker support for Entra ID authentication on Windows. See [release notes](release-notes/Extensions/Azure/7.1/7.1.0-preview2.md).
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2 changes: 1 addition & 1 deletion release-notes/7.1/7.1.0-preview2.md
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Expand Up @@ -108,7 +108,7 @@ This update brings the following changes since the [7.1.0-preview1](7.1.0-previe
- Reduced allocations by avoiding lock acquisition on `SqlErrorCollection` counters when no errors exist, and by avoiding stack-trace materialization for expected `null`-return paths. ([#4157](https://github.com/dotnet/SqlClient/pull/4157), [#4099](https://github.com/dotnet/SqlClient/pull/4099), [#4102](https://github.com/dotnet/SqlClient/pull/4102))
- Improved `EnclaveDiffieHellmanInfo.Size` accuracy. ([#4346](https://github.com/dotnet/SqlClient/pull/4346))
- `SqlVector<float>` now serializes and deserializes little-endian multibyte values explicitly for consistent behavior across architectures. ([#3861](https://github.com/dotnet/SqlClient/pull/3861))
- Updated the bundled .NET 10 SDK to `10.0.300`. ([#4287](https://github.com/dotnet/SqlClient/pull/4287))
- Updated the .NET 10 SDK used to build the repository to `10.0.300`. ([#4287](https://github.com/dotnet/SqlClient/pull/4287))

### Fixed

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