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Add 3.0 breaking change note for SqlClient #1869

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Oct 21, 2019
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Add 3.0 breaking change note for SqlClient #1869

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3 changes: 3 additions & 0 deletions entity-framework/core/providers/sql-server/index.md
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Expand Up @@ -27,6 +27,9 @@ Install-Package Microsoft.EntityFrameworkCore.SqlServer

***

> [!NOTE]
> Since version 3.0.0, the provider references Microsoft.Data.SqlClient (previous versions depended on System.Data.SqlClient). If your project takes a direct dependency on SqlClient, make sure it references the correct package.

## Supported Database Engines

* Microsoft SQL Server (2012 onwards)
27 changes: 26 additions & 1 deletion entity-framework/core/what-is-new/ef-core-3.0/breaking-changes.md
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Expand Up @@ -64,6 +64,7 @@ Changes that we expect to only impact database providers are documented under [p
| [Microsoft.EntityFrameworkCore.Design is now a DevelopmentDependency package](#dip) | Low |
| [SQLitePCL.raw updated to version 2.0.0](#SQLitePCL) | Low |
| [NetTopologySuite updated to version 2.0.0](#NetTopologySuite) | Low |
| [Microsoft.Data.SqlClient is used instead of System.Data.SqlClient](#SqlClient) | Low |
| [Multiple ambiguous self-referencing relationships must be configured](#mersa) | Low |
| [DbFunction.Schema being null or empty string configures it to be in model's default schema](#udf-empty-string) | Low |

Expand Down Expand Up @@ -1591,7 +1592,7 @@ Microsoft.EntityFrameworkCore.Sqlite previously depended on version 1.1.12 of SQ

**New behavior**

We've update our package to depend on version 2.0.0.
We've updated our package to depend on version 2.0.0.

**Why**

Expand Down Expand Up @@ -1623,6 +1624,30 @@ Version 2.0.0 of NetTopologySuite aims to address several usability issues encou

NetTopologySuite version 2.0.0 includes some breaking changes. See the [release notes](https://www.nuget.org/packages/NetTopologySuite/2.0.0-pre001) for details.

<a name="SqlClient"></a>

### Microsoft.Data.SqlClient is used instead of System.Data.SqlClient

[Tracking Issue #15636](https://github.com/aspnet/EntityFrameworkCore/issues/15636)

**Old behavior**

Microsoft.EntityFrameworkCore.SqlServer previously depended on System.Data.SqlClient.

**New behavior**

We've updated our package to depend on Microsoft.Data.SqlClient.

**Why**

Microsoft.Data.SqlClient is the flagship data access driver for SQL Server going forward, and System.Data.SqlClient no longer be the focus of development.
Some important features, such as Always Encrypted, are only available on Microsoft.Data.SqlClient.

**Mitigations**

If your code takes a direct dependency on System.Data.SqlClient, you must change it to reference Microsoft.Data.SqlClient instead; as the two packages maintain a very high degree
of API compatibility, this should only be a simple package and namespace change.

<a name="mersa"></a>

### Multiple ambiguous self-referencing relationships must be configured
Expand Down