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| --- | ||
| 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 | ||
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| 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. | ||
|
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| ## .NET breaking changes | ||
|
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| ### New articles | ||
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| - [.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) | ||
|
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| ## AI in .NET | ||
|
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| ### Updated articles | ||
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| - [Build a .NET AI vector search app](/dotnet/ai/quickstarts/build-vector-search-app) - New vector search quickstart | ||
|
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| ## ML.NET | ||
|
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| ### Updated articles | ||
| ### New articles | ||
|
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| - [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) | ||
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| ## .NET fundamentals | ||
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| ### New articles | ||
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| - [.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) | ||
|
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| ### Updated articles | ||
|
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| - [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 | ||
|
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| ## C# language | ||
|
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| ### New articles | ||
|
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||
| - [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) | ||
|
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| ## F# language | ||
| ### Updated articles | ||
|
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| - [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 | ||
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| ## Azure SDK for .NET | ||
|
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||
| ### Updated articles | ||
|
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| - [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 | ||
|
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| ## .NET Framework | ||
|
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| ### New articles | ||
| ### Updated articles | ||
|
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||
| - [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 | ||
|
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| ## Community contributors | ||
|
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| 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). | ||
|
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||
| - [BartoszKlonowski](https://github.com/BartoszKlonowski) - Bartosz Klonowski  | ||
| - [DaRosenberg](https://github.com/DaRosenberg) - Daniel Rosenberg  | ||
| - [DonCorleone](https://github.com/DonCorleone) - Linus Wieland  | ||
| - [inwenis](https://github.com/inwenis) - fku-incom  | ||
| - [jkone27](https://github.com/jkone27) - gparmigiani  | ||
| - [Nothing-Works](https://github.com/Nothing-Works) - Andy  | ||
| - [oksanatk](https://github.com/oksanatk) - Oksana Tkach  | ||
| - [bigboybamo](https://github.com/bigboybamo) - Olabamiji Oyetubo  | ||
| - [sigmade](https://github.com/sigmade) - Yegor Sychev  | ||
| - [am11](https://github.com/am11) - Adeel Mujahid  | ||
| - [Dixin](https://github.com/Dixin) - Dixin  | ||
| - [EngincanV](https://github.com/EngincanV) - Engincan VESKE  | ||
| - [erop](https://github.com/erop) - Egor Ushakov  | ||
| - [eveshogweyore](https://github.com/eveshogweyore) - Eveshogweyore Alle  | ||
| - [Fantoom](https://github.com/Fantoom) -  | ||
| - [hakenr](https://github.com/hakenr) - Robert Haken  | ||
| - [jiabiao](https://github.com/jiabiao) -  | ||
| - [kaiquekandykoga](https://github.com/kaiquekandykoga) - Kaíque Kandy Koga  | ||
| - [kevincathcart-cas](https://github.com/kevincathcart-cas) -  | ||
| - [Kore-rep](https://github.com/Kore-rep) - Angus Longmore  | ||
| - [mahabubulhasan](https://github.com/mahabubulhasan) - Mahabubul Hasan  | ||
| - [nprorekhin](https://github.com/nprorekhin) - Nikita Prorekhin  | ||
| - [perlun](https://github.com/perlun) - Per Lundberg  | ||
| - [Rageking8](https://github.com/Rageking8) -  | ||
| - [RaphaelSantiago53](https://github.com/RaphaelSantiago53) - Raphael  | ||
| - [stamminator](https://github.com/stamminator) - Jacob Stamm  | ||
| - [timdeschryver](https://github.com/timdeschryver) - Tim Deschryver  | ||
| - [tmds](https://github.com/tmds) - Tom Deseyn  | ||
| - [rakshambigai20](https://github.com/rakshambigai20) - Rakshambigai Balaraman  | ||
| - [rextor92](https://github.com/rextor92) - Daniel Tsvetkov  | ||
| - [sanamhub](https://github.com/sanamhub) - Sanam  | ||
| - [scrooge1987](https://github.com/scrooge1987) - Yurii Rovinskyi  | ||
| - [StephenCleary](https://github.com/StephenCleary) - Stephen Cleary  | ||
| - [thomhurst](https://github.com/thomhurst) - Tom Longhurst  | ||
| - [YohDeadfall](https://github.com/YohDeadfall) - Yoh Deadfall  | ||
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