.NET: Npgsql 10 has been released

[amotl]

About

• https://www.npgsql.org/doc/release-notes/10.0.html
• https://www.npgsql.org/efcore/release-notes/10.0.html

References

• Bump Npgsql from 9.0.4 to 10.0.0 #1266
• Bump Npgsql.EntityFrameworkCore.PostgreSQL from 9.0.4 to 10.0.0 #1269

/cc @surister

[coderabbitai]

Walkthrough

Adds explicit Npgsql 10.x entries to GitHub Actions matrices for C# workflows and updates demo projects to depend on Npgsql/EFCore 10.0.0, replacing prior 9.0.4 references and removing commented NU1202 notes.

Changes

Cohort / File(s)	Summary
GitHub Actions workflows .github/workflows/lang-csharp-efcore.yml, .github/workflows/lang-csharp-npgsql.yml	Added explicit matrix include entries for Npgsql 10.x (e.g., dotnet-version: '10.x' with npgsql-version: '10.*' / prerelease) and removed prior commented NU1202 notes.
Demo project dependency bumps by-language/csharp-efcore/demo.csproj, by-language/csharp-npgsql/demo.csproj	Upgraded package references: Npgsql.EntityFrameworkCore.PostgreSQL and Npgsql from 9.0.4 → 10.0.0.

Sequence Diagram(s)

sequenceDiagram
    autonumber
    participant Dev as Developer (PR)
    participant GH as GitHub Actions
    participant Runner as CI Runner

    Dev->>GH: Push PR with updated workflows and demo csproj files
    GH->>Runner: Create workflow run with matrix
    Note over GH,Runner: Matrix now includes explicit Npgsql 10.x entries
    Runner->>Runner: For each matrix entry\n(set SDK, restore, build, test)
    alt Npgsql 10.x entry
        Runner->>Runner: Use Npgsql 10.* / prerelease\nrun tests targeting .NET 10.x
        Note right of Runner: New/changed path highlighted (green)
    else Other matrix entries
        Runner->>Runner: Use existing Npgsql versions\nrun tests targeting .NET 8/9/10
    end
    Runner-->>GH: Report results
    GH-->>Dev: Display workflow status

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Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Focus review on workflow matrix entries and version strings in project files.
• Check CI matrix semantics and conditional scoping for .NET 10 + Npgsql 10.x compatibility.
• Verify no unintended package downgrade/restore lockfile conflicts.

Possibly related PRs

• .NET/CI: Improve testing, also against pre-release versions of Npgsql #1257 — Introduced matrix-driven Npgsql testing for C# workflows; closely related foundation for adding Npgsql 10.x.
• .NET/CI: Validate on .NET 8.x, 9.x #1252 — Earlier changes to C# workflow dotnet-version matrix and SDK pinning; relevant to matrix adjustments.

Suggested reviewers

• seut
• surister

Poem

🐰 Hop and nibble, code in tow,
Npgsql ten begins to grow,
Workflows hum and demos gleam,
From nine to ten — a shiny dream,
Tests shall run, and carrots glow 🥕✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly summarizes the main change: updating the codebase to support Npgsql 10, which is reflected across workflow files and project dependencies.
Description check	✅ Passed	The description is related to the changeset, providing context through release notes links and referencing related GitHub issues, though minimal in detail.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch npgsql-10

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 2cf2e61 and 8b86f87.

📒 Files selected for processing (1)

• .github/workflows/lang-csharp-efcore.yml (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• .github/workflows/lang-csharp-efcore.yml

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