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SqlConnection fails to connect to a new database if an attempt was made before the database existed

Status: Open.

#3875 In dotnet/SqlClient;

· inoa-agrillo opened on Jan 9, 2026

Exception <code>System.ArgumentNullException: Value cannot be null. (Parameter 'bytes')</code> when UseCompatibilityAsyncBehaviour=false

Repro Available ✔️Issues that are reproducible with repro provided.Issues that are reproducible with repro provided.

Up-for-Grabs 🙌Issues that are ready to be picked up for anyone interested. Please self-assign and remove the labelIssues that are ready to be picked up for anyone interested. Please self-assign and remove the label

Status: Open.

Bug

#3871 In dotnet/SqlClient;

· kaiohenrique opened on Jan 8, 2026

Connection not working but not throwing exceptions

Waiting for Customer ⏳Issues/PRs waiting for user response/action.Issues/PRs waiting for user response/action.

Status: Open.

Bug

#3868 In dotnet/SqlClient;

· rngkushner opened on Jan 7, 2026

[5.1] Flaky Test: TransientFault_IgnoreServerProvidedFailoverPartner_ShouldConnectToUserProvidedPartner

Area\TestsIssues that are targeted to tests or test projectsIssues that are targeted to tests or test projects

Status: Open.

Task

#3855 In dotnet/SqlClient;

· paulmedynski opened on Dec 18, 2025

Backport to MDS v6.0 || NullReferenceException issue when using SqlDataAdapter with Always Encrypted and UpdateBatchSize &gt; 1

Status: Open.

Task

#3848 In dotnet/SqlClient;

· priyankatiwari08 opened on Dec 15, 2025

·  

6.0.5

Backport to MDS v6.1 || NullReferenceException issue when using SqlDataAdapter with Always Encrypted and UpdateBatchSize &gt; 1

Repro Available ✔️Issues that are reproducible with repro provided.Issues that are reproducible with repro provided.

Status: Open.

Task

#3845 In dotnet/SqlClient;

· priyankatiwari08 opened on Dec 15, 2025

·  

6.1.4

SqlCommand: EnableOptimizedParameterBinding throws error when used together with Prepare

Status: Open.

Feature

#3835 In dotnet/SqlClient;

· IAmTheCShark opened on Dec 8, 2025

GetSchema("DataTypes") does not return entries for JSON and VECTOR types

Status: Open.

Feature

#3833 In dotnet/SqlClient;

· igor-tkachev opened on Dec 8, 2025

SqlConnectionReliabilityTests are flaky

ActiveIssueItems that are tagged as active issues in tests.Items that are tagged as active issues in tests.

Area\TestsIssues that are targeted to tests or test projectsIssues that are targeted to tests or test projects

Status: Open.

Task

#3821 In dotnet/SqlClient;

· mdaigle opened on Dec 2, 2025

Active Directory Interactive doesn't work with .NET 10 on macOS

External 🔗Issue is in an external componentIssue is in an external component

Status: Open.

Bug

#3820 In dotnet/SqlClient;

· jrr opened on Dec 2, 2025

·  

7.0.0-preview4

[6.0] Remove unused dependencies

Status: Open.

Task

#3808 In dotnet/SqlClient;

· paulmedynski opened on Nov 25, 2025

·  

6.0.5

Remove unused dependencies

Hotfix Candidate 🚑Issues/PRs that are candidate for backporting to earlier supported versions.Issues/PRs that are candidate for backporting to earlier supported versions.

Status: Open.

Task

#3806 In dotnet/SqlClient;

· paulmedynski opened on Nov 25, 2025

·  

7.0.0