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114 changes: 64 additions & 50 deletions docs/whats-new/dotnet-docs-mod0.md
Original file line number Diff line number Diff line change
@@ -1,89 +1,103 @@
---
title: ".NET docs: What's new for December 2024"
description: "What's new in the .NET docs for December 2024."
ms.custom: December-2024
ms.date: 01/01/2025
title: ".NET docs: What's new for March 2025"
description: "What's new in the .NET docs for March 2025."
ms.custom: March-2025
ms.date: 04/01/2025
---

# .NET docs: What's new for December 2024
# .NET docs: What's new for March 2025

Welcome to what's new in the .NET docs for December 2024. This article lists some of the major changes to docs during this period.
Welcome to what's new in the .NET docs for March 2025. This article lists some of the major changes to docs during this period.

## .NET breaking changes

### New articles

- [.NET Monitor images simplified to version-only tags](../core/compatibility/containers/9.0/monitor-images.md)
- [C# overload resolution prefers `params` span-type overloads](../core/compatibility/core-libraries/9.0/params-overloads.md)
- [Legacy Mono and Emscripten JavaScript APIs not exported to global namespace](../core/compatibility/aspnet-core/9.0/legacy-apis.md)
- [New version of some OOB packages](../core/compatibility/core-libraries/9.0/oob-packages.md)
- [Nullable JsonDocument properties deserialize to JsonValueKind.Null](../core/compatibility/serialization/9.0/jsondocument-props.md)
- [APIs Removed from System.Security.Cryptography.Pkcs netstandard2.0](../core/compatibility/cryptography/9.0/api-removed-pkcs.md)
- [Applications referencing both WPF and WinForms must disambiguate MenuItem and ContextMenu types](../core/compatibility/windows-forms/10.0/menuitem-contextmenu.md)
- [Change default workload configuration from 'loose manifests' to 'workload sets' mode](../core/compatibility/sdk/10.0/default-workload-config.md)
- [MSBuild custom culture resource handling](../core/compatibility/sdk/10.0/msbuild-custom-culture.md)
- [NU1510 is raised for direct references pruned by NuGet](../core/compatibility/sdk/10.0/nu1510-pruned-references.md)
- [Windows Forms obsoletions (.NET 10)](../core/compatibility/windows-forms/10.0/obsolete-apis.md)
- [X509Certificate and PublicKey key parameters can be null](../core/compatibility/cryptography/10.0/x509-publickey-null.md)

## AI in .NET

### Updated articles

- [Build a .NET AI vector search app](/dotnet/ai/quickstarts/build-vector-search-app) - New vector search quickstart

## ML.NET

### Updated articles
### New articles

- [Machine learning tasks in ML.NET](../machine-learning/resources/tasks.md) - Add text classification and sentence similarity to ML tasks
- [Create a .NET AI app to chat with custom data using the AI app template extensions](../ai/quickstarts/ai-templates.md)
- [Tutorial: Evaluate a model's response with response caching and reporting](../ai/tutorials/evaluate-with-reporting.md)

## .NET fundamentals

### New articles

- [.NET debugger extensions](../core/diagnostics/debugger-extensions.md)
- [.NET debugger extensions installer (dotnet-debugger-extensions)](../core/diagnostics/dotnet-debugger-extensions.md)
- [Artificial intelligence in .NET (Preview)](../core/extensions/artificial-intelligence.md)
- [Built-in activities in .NET](../core/diagnostics/distributed-tracing-builtin-activities.md)
- [IL2123: `RequiresUnreferencedCodeAttribute` cannot be placed directly on application entry point](../core/deploying/trimming/trim-warnings/il2123.md)
- [IL3005: `RequiresAssemblyFilesAttribute` cannot be placed directly on application entry point](../core/deploying/single-file/warnings/il3005.md)
- [IL3057: `RequiresDynamicCodeAttribute` cannot be placed directly on application entry point](../core/deploying/native-aot/warnings/il3057.md)
- [The `TestContext` class](../core/testing/unit-testing-mstest-writing-tests-testcontext.md)
- [What is TimeProvider?](../standard/datetime/timeprovider-overview.md)
- [Compliance libraries in .NET](../core/extensions/compliance.md)
- [Data classification in .NET](../core/extensions/data-classification.md)
- [Data redaction in .NET](../core/extensions/data-redaction.md)
- [Generate unit tests with GitHub Copilot](../core/testing/unit-testing-with-copilot.md)
- [Mutation testing](../core/testing/mutation-testing.md)
- [Simplify LINQ type check and cast (IDE0121)](../fundamentals/code-analysis/style-rules/ide0121.md)
- [Source-generated metrics with strongly typed tags](../core/diagnostics/metrics-strongly-typed.md)
- [Unit testing C# in .NET using dotnet test and xUnit](../core/testing/unit-testing-csharp-with-xunit.md)
- [Use collection expression for new (IDE0306)](../fundamentals/code-analysis/style-rules/ide0306.md)
- [Use implicitly typed lambda (IDE0350)](../fundamentals/code-analysis/style-rules/ide0350.md)
- [Use unbound generic type (IDE0340)](../fundamentals/code-analysis/style-rules/ide0340.md)

### Updated articles

- [Configure MSTest](../core/testing/unit-testing-mstest-configure.md) - MSTest: document testconfig.json
- [How to stream XML fragments from an XmlReader (LINQ to XML)](../standard/linq/stream-xml-fragments-xmlreader.md) - Fixed incorrect logic in XmlReader's example (#43799)
- [Supported types in System.Text.Json](../standard/serialization/system-text-json/supported-types.md) - Add supported types for STJ article
- [Make HTTP requests with the HttpClient class](../fundamentals/networking/http/httpclient.md) - Freshness Edit: dotnet content
- [Unit testing best practices for .NET](../core/testing/unit-testing-best-practices.md) - Freshness Edit: dotnet content
- [What's new in .NET 10](../core/whats-new/dotnet-10/overview.md) - Update What's New for .NET 10 with Preview 2 info

## C# language

### New articles
### Updated articles

- [Deconstruction expression - Extract properties of fields from a tuple or other user-defined type](../csharp/language-reference/operators/deconstruction.md)
- [Discard - A `_` acts as a placeholder for a variable](../csharp/language-reference/tokens/discard.md)
- [C# `if` statements and loops - conditional logic tutorial](../csharp/tour-of-csharp/tutorials/branches-and-loops.md)
- [How to use integer and floating point numbers in C\#](../csharp/tour-of-csharp/tutorials/numbers-in-csharp.md)
- [Introduction to C# - interactive tutorial](../csharp/tour-of-csharp/tutorials/hello-world.md)
- [Learn to manage data collections using List\<T> in C\#](../csharp/tour-of-csharp/tutorials/list-collection.md)
- [Asynchronous programming scenarios](../csharp/asynchronous-programming/async-scenarios.md) - Freshness Edit: dotnet content
- [Attributes](../csharp/advanced-topics/reflection-and-attributes/index.md) - Freshness Edit: dotnet content

## F# language
## Azure SDK for .NET

### Updated articles

- [Attributes (F#)](../fsharp/language-reference/attributes.md) - F# 9 doc updates
- [Authenticate .NET apps to Azure services during local development using service principals](../azure/sdk/authentication/local-development-service-principal.md) - Update guidance and remove tables

## .NET Framework

### New articles
### Updated articles

- [Install .NET Framework on Windows Server 2025](../framework/install/on-windows-and-server.md#install-net-framework-on-windows-server)
- [November 2024 cumulative update preview](../framework/release-notes/2024/11-21-november-preview-cumulative-update.md)
- [SqlMetal.exe (Code Generation Tool)](../framework/tools/sqlmetal-exe-code-generation-tool.md) - Fix build suggestions

## Community contributors

The following people contributed to the .NET docs during this period. Thank you! Learn how to contribute by following the links under "Get involved" in the [what's new landing page](index.yml).

- [BartoszKlonowski](https://github.com/BartoszKlonowski) - Bartosz Klonowski ![2 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-2-green)
- [DaRosenberg](https://github.com/DaRosenberg) - Daniel Rosenberg ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [DonCorleone](https://github.com/DonCorleone) - Linus Wieland ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [inwenis](https://github.com/inwenis) - fku-incom ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [jkone27](https://github.com/jkone27) - gparmigiani ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [Nothing-Works](https://github.com/Nothing-Works) - Andy ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [oksanatk](https://github.com/oksanatk) - Oksana Tkach ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [bigboybamo](https://github.com/bigboybamo) - Olabamiji Oyetubo ![3 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-3-green)
- [sigmade](https://github.com/sigmade) - Yegor Sychev ![2 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-2-green)
- [am11](https://github.com/am11) - Adeel Mujahid ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [Dixin](https://github.com/Dixin) - Dixin ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [EngincanV](https://github.com/EngincanV) - Engincan VESKE ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [erop](https://github.com/erop) - Egor Ushakov ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [eveshogweyore](https://github.com/eveshogweyore) - Eveshogweyore Alle ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [Fantoom](https://github.com/Fantoom) - ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [hakenr](https://github.com/hakenr) - Robert Haken ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [jiabiao](https://github.com/jiabiao) - ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [kaiquekandykoga](https://github.com/kaiquekandykoga) - Kaíque Kandy Koga ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [kevincathcart-cas](https://github.com/kevincathcart-cas) - ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [Kore-rep](https://github.com/Kore-rep) - Angus Longmore ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [mahabubulhasan](https://github.com/mahabubulhasan) - Mahabubul Hasan ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [nprorekhin](https://github.com/nprorekhin) - Nikita Prorekhin ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [perlun](https://github.com/perlun) - Per Lundberg ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [Rageking8](https://github.com/Rageking8) - ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [RaphaelSantiago53](https://github.com/RaphaelSantiago53) - Raphael ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [stamminator](https://github.com/stamminator) - Jacob Stamm ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [timdeschryver](https://github.com/timdeschryver) - Tim Deschryver ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [tmds](https://github.com/tmds) - Tom Deseyn ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [rakshambigai20](https://github.com/rakshambigai20) - Rakshambigai Balaraman ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [rextor92](https://github.com/rextor92) - Daniel Tsvetkov ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [sanamhub](https://github.com/sanamhub) - Sanam ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [scrooge1987](https://github.com/scrooge1987) - Yurii Rovinskyi ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [StephenCleary](https://github.com/StephenCleary) - Stephen Cleary ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [thomhurst](https://github.com/thomhurst) - Tom Longhurst ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
- [YohDeadfall](https://github.com/YohDeadfall) - Yoh Deadfall ![1 pull requests.](https://img.shields.io/badge/Merged%20Pull%20Requests-1-green)
6 changes: 3 additions & 3 deletions docs/whats-new/index.yml
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Expand Up @@ -5,7 +5,7 @@ summary: Welcome to what's new in .NET and .NET docs. Use this page to navigate
metadata:
title: .NET what's new?
description: Learn about new .NET features and new and updated content in .NET docs.
ms.date: 03/01/2025
ms.date: 04/01/2025
ms.topic: landing-page
landingContent:
- title: .NET 10 release updates
Expand Down Expand Up @@ -40,12 +40,12 @@ landingContent:
linkLists:
- linkListType: whats-new
links:
- text: March 2025
url: dotnet-docs-mod0.md
- text: February 2025
url: dotnet-docs-mod2.md
- text: January 2025
url: dotnet-docs-mod1.md
- text: December 2024
url: dotnet-docs-mod0.md
- title: Language updates
linkLists:
- linkListType: whats-new
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4 changes: 2 additions & 2 deletions docs/whats-new/toc.yml
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Expand Up @@ -6,12 +6,12 @@ items:
- name: Latest documentation updates
expanded: true
items:
- name: March 2025
href: dotnet-docs-mod0.md
- name: February 2025
href: dotnet-docs-mod2.md
- name: January 2025
href: dotnet-docs-mod1.md
- name: December 2024
href: dotnet-docs-mod0.md
- name: Product updates
items:
- name: .NET 10
Expand Down