Sandbox::https://github.com/dotnet/SqlClient/pull/4261

mdaigle · 2026-05-06T18:19:18Z

This pull request refactors the connection management code to simplify method signatures and remove the use of the SqlConnectionOptions userOptions parameter from internal APIs and connection pool implementations. The main goal is to streamline the process of opening and replacing connections, making the codebase easier to maintain and less error-prone.

Connection Management API Simplification:

Removed the SqlConnectionOptions userOptions parameter from the signatures of TryOpenConnection, TryReplaceConnection, and related methods in DbConnectionInternal, DbConnectionClosed, and SqlConnectionInternal. All internal logic and calls have been updated accordingly. [1] [2] [3] [4] [5]
Updated the implementation of TryOpenConnectionInternal and its callers to no longer require or pass userOptions. [1] [2]

Connection Pool Interface and Implementation Updates:

Simplified the IDbConnectionPool interface by removing the userOptions parameter from TryGetConnection and ReplaceConnection, and updated all implementing classes (ChannelDbConnectionPool, WaitHandleDbConnectionPool) to match the new signatures. [1] [2] [3] [4] [5] [6]
Refactored all usages of connection pool methods to remove the now-unnecessary userOptions argument, including internal helper methods such as OpenNewInternalConnection and GetInternalConnection. [1] [2] [3] [4] [5]

Code Clean-up and Comments:

Removed obsolete comments and code related to userConnectionOptions, including .NET Framework-specific permission demand logic that is no longer relevant. [1] [2] [3]

New tests for CAS Functionality

Added tests to verify that the appropriate permissions are demanded when opening a connection. CAS is a deprecated feature, but we maintain it for backwards compatibility.

These changes collectively modernize and clarify the connection handling logic, reducing unnecessary complexity and improving maintainability.

Co-authored-by: Copilot <copilot@github.com>

Copilot

Pull request overview

This pull request simplifies SqlClient’s internal connection-opening and pooling pathways by removing the redundant SqlConnectionOptions userOptions parameter from multiple internal methods/constructors, aligning call chains across pooled/non-pooled and sync/async flows.

Changes:

Removed userOptions from internal open/replace/get-connection APIs (DbConnectionInternal/DbConnectionClosed/SqlConnectionInternal → SqlConnectionFactory → IDbConnectionPool implementations).
Updated IDbConnectionPool and both pool implementations (wait-handle + channel-based) to the new signatures.
Updated unit tests to use the simplified pool API surface.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/Microsoft.Data.SqlClient/tests/UnitTests/ConnectionPool/WaitHandleDbConnectionPoolTransactionTest.cs	Updates unit tests to call pool APIs without `SqlConnectionOptions`.
src/Microsoft.Data.SqlClient/tests/UnitTests/ConnectionPool/TransactedConnectionPoolTest.cs	Updates mock `IDbConnectionPool` implementation signatures to match interface changes.
src/Microsoft.Data.SqlClient/tests/UnitTests/ConnectionPool/ChannelDbConnectionPoolTest.cs	Updates tests to remove `SqlConnectionOptions` arguments from pool calls.
src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/SqlConnectionFactory.cs	Removes `userOptions` threading through connection creation/open paths and pool calls.
src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/SqlConnection.cs	Updates open logic to call `TryOpenConnection`/`TryReplaceConnection` without `UserConnectionOptions`.
src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/ConnectionPool/WaitHandleDbConnectionPool.cs	Removes `userOptions` from pending/open/create APIs and replaces usages with simplified calls.
src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/ConnectionPool/IDbConnectionPool.cs	Simplifies interface by removing `userOptions` from `TryGetConnection` and `ReplaceConnection`.
src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/ConnectionPool/ChannelDbConnectionPool.cs	Updates interface implementation and removes `userOptions` plumbing from internal open logic.
src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/Connection/SqlConnectionInternal.cs	Removes optional `userConnectionOptions` parameter and associated NETFRAMEWORK permission-demand block.
src/Microsoft.Data.SqlClient/src/Microsoft/Data/ProviderBase/DbConnectionInternal.cs	Updates internal open pipeline to no longer pass `userOptions` into factory/pool methods.
src/Microsoft.Data.SqlClient/src/Microsoft/Data/ProviderBase/DbConnectionClosed.cs	Updates closed-state open/replace paths to match the simplified method signatures.

Copilot

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

Copilot

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

codecov · 2026-05-07T07:45:38Z

Codecov Report

❌ Patch coverage is 87.50000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.56%. Comparing base (be95ca2) to head (be09e9a).

Files with missing lines	Patch %	Lines
.../Microsoft/Data/ProviderBase/DbConnectionClosed.cs	33.33%	2 Missing ⚠️
...icrosoft/Data/ProviderBase/DbConnectionInternal.cs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4261      +/-   ##
==========================================
- Coverage   65.96%   64.56%   -1.41%     
==========================================
  Files         275      270       -5     
  Lines       42993    65777   +22784     
==========================================
+ Hits        28361    42468   +14107     
- Misses      14632    23309    +8677

Flag	Coverage Δ
CI-SqlClient	`?`
PR-SqlClient-Project	`64.56% <87.50%> (?)`

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mdaigle and others added 2 commits May 6, 2026 09:08

Remove cascading user options parameter only used for debug assertions.

06d178a

Co-authored-by: Copilot <copilot@github.com>

Fix pool and pooling tests.

d6fb50a

Copilot AI review requested due to automatic review settings May 6, 2026 18:19

github-project-automation Bot added this to SqlClient Board May 6, 2026

github-project-automation Bot moved this to To triage in SqlClient Board May 6, 2026

Copilot started reviewing on behalf of mdaigle May 6, 2026 18:20

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Copilot AI reviewed May 6, 2026

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Comment thread ...oft.Data.SqlClient/src/Microsoft/Data/SqlClient/ConnectionPool/WaitHandleDbConnectionPool.cs Resolved

Add tests for permission demands.

d83f79d

mdaigle added this to the 7.1.0-preview2 milestone May 6, 2026

mdaigle marked this pull request as ready for review May 6, 2026 21:07

mdaigle requested a review from a team as a code owner May 6, 2026 21:07

Copilot AI review requested due to automatic review settings May 6, 2026 21:07

Copilot started reviewing on behalf of mdaigle May 6, 2026 21:08

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mdaigle mentioned this pull request May 6, 2026

Feature | Redesign the SqlClient Connection Pool to Improve Performance and Async Support #3356

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Copilot AI reviewed May 6, 2026

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Remove old comment

636a5e8

Copilot AI review requested due to automatic review settings May 6, 2026 21:25

Copilot started reviewing on behalf of mdaigle May 6, 2026 21:26

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Update test namespace

8a94c0f

Copilot AI reviewed May 6, 2026

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Comment thread ...rosoft.Data.SqlClient/src/Microsoft/Data/SqlClient/ConnectionPool/ChannelDbConnectionPool.cs Resolved

Add connect timeout to tests.

be09e9a

mdaigle commented May 6, 2026

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cheenamalhotra approved these changes May 7, 2026

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apoorvdeshmukh approved these changes May 7, 2026

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mdaigle merged commit 4a36399 into main May 7, 2026
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mdaigle deleted the dev/mdaigle/remove-extra-connection-options branch May 7, 2026 13:43

github-project-automation Bot moved this from To triage to Done in SqlClient Board May 7, 2026

paulmedynski pushed a commit that referenced this pull request May 7, 2026

Remove extra connection options parameters (#4261)

62f4419

dependabot Bot mentioned this pull request Jul 13, 2026

Bump Microsoft.Data.SqlClient from 7.1.0-preview1.26124.5 to 7.1.0-preview2.26190.5 Taiizor/UUID#95

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Remove extra connection options parameters - #4261

Remove extra connection options parameters#4261
mdaigle merged 6 commits into
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mdaigle commented May 6, 2026 •

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mdaigle commented May 6, 2026 •

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