Adding support for .NET 10

[priyankatiwari08]

Description

As part of adding support for .NET 10 below changes has been done:

1. Removing redundant PackageReference entries for assemblies now included in the .NET 10 Base Class Library. Keeping them caused runtime redundancy and potential NU1510 errors during SDK pruning:

   • Sytem.Text.Json
   • System.Text.Encodings.Web
   • System.Buffers
   • System.Memory
   • System.Runtime.InteropServices.RuntimeInformation

2. Enabled multi-targeting for .NET 10 in test projects to ensure compatibility and proper coverage.

Issues

#3576
Customer issue: #3522

[Copilot]

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[Copilot]

Pull Request Overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.

[Copilot]

The method declaration is missing the [Fact] attribute and proper access modifier. The line appears to be malformed with mixed indentation and missing test attribute.

[Copilot]

Adding this package reference appears unrelated to .NET 10 support. This change should be in a separate commit or PR as it doesn't align with the stated purpose of adding .NET 10 support.

Suggested change

<PackageReference Include="Microsoft.Data.SqlClient.SNI.runtime" />

[paulmedynski]

I agree.

[paulmedynski]

I think your best bet will be to update the pipelines to install the .NET 10 SDK (instead of .NET 9 SDK), and ensure that we use .NET 10 SDK to build and run the test projects.

The driver projects must remain using .NET 9 SDK to build.

[paulmedynski]

I think the correct way to include System.Text.Encodings.Web for target frameworks less than 10 is:

  <ItemGroup Condition="$([MSBuild]::VersionLessThan($([MSBuild]::GetTargetFrameworkVersion($(TargetFramework))), '10.0'))">
    <PackageReference Include="System.Text.Encodings.Web" />
  </ItemGroup>

I made a test project and that seems to behave as we want.

[paulmedynski]

I agree.

[paulmedynski]

So, making this change will require that we start using the .NET 10 SDK to build the tests everywhere (locally as devs and during all pipelines).

For devs, that's fine - we just need to install the .NET 10 SDK wherever we're developing. We will need to update the BUILDGUIDE.md to reflect this new requiremet.

For pipelines, we will need to find everywhere that we perform a build of the tests and add a step that installs the .NET 10 SDK. If you do this, then you can use the existing CI pipelines to verify .NET 10 compatibility rather than trying to get the tests to run for you locally (which is close to impossible currently).

[paulmedynski]

You could use $([MSBuild]::VersionGreaterThanOrEquals(...)) here and below.

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[mdaigle]

The driver projects must remain using .NET 9 SDK to build.

@paulmedynski I've been thinking about this. We can start publishing a .NET 10 dll with only a minor version bump. Maybe we target our spring 7.1 release for that addition. At that point it should be better supported in all the build tooling.