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| --- | ||
| title: ".NET docs: What's new for February 2025" | ||
| description: "What's new in the .NET docs for February 2025." | ||
| ms.custom: February-2025 | ||
| ms.date: 03/01/2025 | ||
| title: ".NET docs: What's new for May 2025" | ||
| description: "What's new in the .NET docs for May 2025." | ||
| ms.custom: May-2025 | ||
| ms.date: 06/01/2025 | ||
| --- | ||
|
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| # .NET docs: What's new for February 2025 | ||
| # .NET docs: What's new for May 2025 | ||
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| Welcome to what's new in the .NET docs for February 2025. This article lists some of the major changes to docs during this period. | ||
| Welcome to what's new in the .NET docs for May 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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| - [Ambiguous overload resolution affecting StringValues implicit operators](../core/compatibility/core-libraries/9.0/ambiguous-overload.md) | ||
| - [Default .NET images use Ubuntu](../core/compatibility/containers/10.0/default-images-use-ubuntu.md) | ||
| - [Environment variable renamed to DOTNET_OPENSSL_VERSION_OVERRIDE](../core/compatibility/cryptography/10.0/version-override.md) | ||
| - [MSBUILDCUSTOMBUILDEVENTWARNING escape hatch removed](../core/compatibility/sdk/10.0/custom-build-event-warning.md) | ||
| - [System.Linq.AsyncEnumerable in .NET 10](../core/compatibility/core-libraries/10.0/asyncenumerable.md) | ||
| - [System.Text.Json metadata reader now unescapes metadata property names](../core/compatibility/serialization/9.0/json-metadata-reader.md) | ||
| - [System.Windows.Forms.StatusStrip uses a different default renderer](../core/compatibility/windows-forms/9.0/statusstrip-renderer.md) | ||
| - [System.Windows.Forms.StatusStrip uses System RenderMode by default](../core/compatibility/windows-forms/10.0/statusstrip-renderer.md) | ||
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| ### Updated articles | ||
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| - [Breaking changes in .NET 7](../core/compatibility/7.0.md) - .NET 7 breaking changes overview behavioral changes clarity | ||
| - [HTTP warnings promoted to errors in `dotnet package list` and `dotnet package search`](../core/compatibility/sdk/10.0/http-warnings-to-errors.md) | ||
| - [Incorrect usage of DynamicResource causes application crash](../core/compatibility/wpf/10.0/dynamicresource-crash.md) | ||
| - [ProviderAliasAttribute moved to Microsoft.Extensions.Logging.Abstractions](../core/compatibility/extensions/10.0/provideraliasattribute-moved-assembly.md) | ||
| - [Specifying DllImportSearchPath.AssemblyDirectory only searches the assembly directory](../core/compatibility/interop/10.0/search-assembly-directory.md) | ||
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| ## AI in .NET | ||
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| ### New articles | ||
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| - [Evaluate a model's response](../ai/quickstarts/evaluate-ai-response.md) | ||
| - [The Microsoft.Extensions.AI.Evaluation libraries (Preview)](../ai/conceptual/evaluation-libraries.md) | ||
| - [Create a minimal MCP client using .NET](../ai/quickstarts/build-mcp-client.md) | ||
| - [Create and connect to a minimal MCP server using .NET](../ai/quickstarts/build-mcp-server.md) | ||
| - [Get started with .NET AI and the Model Context Protocol](../ai/get-started-mcp.md) | ||
| - [Microsoft.Extensions.AI libraries](../ai/microsoft-extensions-ai.md) | ||
| - [Request a response with structured output](../ai/quickstarts/structured-output.md) | ||
| - [Tutorial: Evaluate response safety with caching and reporting](../ai/tutorials/evaluate-safety.md) | ||
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| ## .NET fundamentals | ||
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| ### New articles | ||
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| - [Install and use LLDB on Linux](../core/diagnostics/lldb-linux.md) | ||
| - [MSTEST0041: Use 'ConditionBaseAttribute' on test classes](../core/testing/mstest-analyzers/mstest0041.md) | ||
| - [What's new in .NET 10](../core/whats-new/dotnet-10/overview.md) | ||
| - [What's new in .NET libraries for .NET 10](../core/whats-new/dotnet-10/libraries.md) | ||
| - [What's new in the .NET 10 runtime](../core/whats-new/dotnet-10/runtime.md) | ||
| - [What's new in the SDK and tooling for .NET 10](../core/whats-new/dotnet-10/sdk.md) | ||
| - [GitHub Copilot app modernization - upgrade for .NET FAQ](../core/porting/github-copilot-app-modernization-faq.yml) | ||
| - [Install GitHub Copilot app modernization - upgrade for .NET](../core/porting/github-copilot-app-modernization-install.md) | ||
| - [What is GitHub Copilot app modernization - upgrade for .NET?](../core/porting/github-copilot-app-modernization-overview.md) | ||
| - [Log buffering in .NET](../core/extensions/log-buffering.md) | ||
| - [Log sampling in .NET](../core/extensions/log-sampling.md) | ||
| - [Implement with Copilot (IDE3000)](../fundamentals/code-analysis/style-rules/ide3000.md) | ||
| - [.NET runtime wait handle events](../fundamentals/diagnostics/runtime-wait-handle-events.md) | ||
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| ### Updated articles | ||
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||
| - [C# formatting options](../fundamentals/code-analysis/style-rules/csharp-formatting-options.md) - Add default value for csharp_space_between_parentheses | ||
| - [Configure MSTest](../core/testing/unit-testing-mstest-configure.md) - Improve MSTest testconfig doc | ||
| - [dotnet test](../core/tools/dotnet-test.md) - Add documentation to the new dotnet test | ||
| - [How to perform streaming transform of large XML documents (LINQ to XML)](../standard/linq/perform-streaming-transform-large-xml-documents.md) - Fixed incorrect logic in another XmlReader's example | ||
| - [How to stream XML fragments with access to header information (LINQ to XML)](../standard/linq/stream-xml-fragments-access-header-information.md) - Fixed incorrect logic in another XmlReader's example | ||
| - [Debug ThreadPool starvation](../core/diagnostics/debug-threadpool-starvation.md) - Add dotnet-trace to Debug ThreadPool Starvation | ||
| - [What's new in .NET libraries for .NET 10](../core/whats-new/dotnet-10/libraries.md) - What's new in Preview 4 | ||
| - [What's new in the .NET 10 runtime](../core/whats-new/dotnet-10/runtime.md) - What's new in Preview 4 | ||
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| ## C# language | ||
|
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| ### New articles | ||
|
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||
| - [What's new in C# 14](../csharp/whats-new/csharp-14.md) | ||
|
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| ### Updated articles | ||
|
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| - [Resolve nullable warnings](../csharp/language-reference/compiler-messages/nullable-warnings.md) - Add additional nullable reference warnings and errors | ||
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| ## Azure SDK for .NET | ||
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| ### New articles | ||
|
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| - [Authenticate Azure-hosted .NET apps to Azure resources using a user-assigned managed identity](../azure/sdk/authentication/user-assigned-managed-identity.md) | ||
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| ## .NET Framework | ||
|
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| ### New articles | ||
|
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||
| - [Install .NET Framework on Windows and Windows Server](../framework/install/on-windows-and-server.md) | ||
| - [January 2025 cumulative update preview](../framework/release-notes/2025/01-28-january-cumulative-update-preview.md) | ||
| - [Compiler Error CS9036](../csharp/language-reference/compiler-messages/cs9036.md) | ||
| - [Errors and warnings for string literal declarations](../csharp/language-reference/compiler-messages/string-literal.md) | ||
| - [Errors and warnings related to extension methods declared with `this` parameters or `extension` blocks](../csharp/language-reference/compiler-messages/extension-declarations.md) | ||
| - [Match data against patterns](../csharp/tour-of-csharp/tutorials/pattern-matching.md) | ||
|
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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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||
| - [Rageking8](https://github.com/Rageking8) -  | ||
| - [Knar33](https://github.com/Knar33) - Knar  | ||
| - [BartoszKlonowski](https://github.com/BartoszKlonowski) - Bartosz Klonowski  | ||
| - [BenjaminMichaelis](https://github.com/BenjaminMichaelis) - Benjamin Michaelis  | ||
| - [cacamille3](https://github.com/cacamille3) - Camille Guérin  | ||
| - [egil](https://github.com/egil) - Egil Hansen  | ||
| - [i2van](https://github.com/i2van) - Ivan Ivon  | ||
| - [james-crawshaw](https://github.com/james-crawshaw) -  | ||
| - [JoonghyunCho](https://github.com/JoonghyunCho) - Jay Cho  | ||
| - [jwreford99](https://github.com/jwreford99) - Julian Wreford  | ||
| - [kendra-svg](https://github.com/kendra-svg) - Kendra Sancho Vega  | ||
| - [maartenba](https://github.com/maartenba) - Maarten Balliauw  | ||
| - [michelebastione](https://github.com/michelebastione) - Michele Bastione  | ||
| - [mpolewaczyk](https://github.com/mpolewaczyk) - Mateusz Polewaczyk  | ||
| - [newmancodes](https://github.com/newmancodes) - Stephen Newman  | ||
| - [RadwanAlfakseh](https://github.com/RadwanAlfakseh) - Radwan Nabeel Alfakseh  | ||
| - [selaskar](https://github.com/selaskar) -  | ||
| - [ShaoHans](https://github.com/ShaoHans) - ShaoHans  | ||
| - [sonergonul](https://github.com/sonergonul) - Soner Gönül  | ||
| - [theluckyprogrammer](https://github.com/theluckyprogrammer) - Tomasz Osmanowski  | ||
| - [thomasclaudiushuber](https://github.com/thomasclaudiushuber) - Thomas Claudius Huber  | ||
| - [tsahi](https://github.com/tsahi) - tsahi  | ||
| - [BartoszKlonowski](https://github.com/BartoszKlonowski) - Bartosz Klonowski  | ||
| - [copilot-swe-agent](https://github.com/copilot-swe-agent) -  | ||
| - [Rageking8](https://github.com/Rageking8) -  | ||
| - [verdie-g](https://github.com/verdie-g) - Grégoire  | ||
| - [AKapeniak](https://github.com/AKapeniak) - Andy Kapeniak  | ||
| - [bdukes](https://github.com/bdukes) - Brian Dukes  | ||
| - [Bouke](https://github.com/Bouke) - Bouke Haarsma  | ||
| - [calebspain](https://github.com/calebspain) - Caleb Spain  | ||
| - [felisevan](https://github.com/felisevan) -  | ||
| - [gayuvick](https://github.com/gayuvick) - Gayu  | ||
| - [Happypig375](https://github.com/Happypig375) - Hadrian Tang  | ||
| - [ieviev](https://github.com/ieviev) -  | ||
| - [KnapSac](https://github.com/KnapSac) - Casper Verhaar  | ||
| - [LeMinh22621](https://github.com/LeMinh22621) - Lê Hồng Minh  | ||
| - [lubugit](https://github.com/lubugit) -  | ||
| - [mbeirouti](https://github.com/mbeirouti) - Matthew Beirouti  | ||
| - [MBSadeghzadeh](https://github.com/MBSadeghzadeh) -  | ||
| - [neel-middleware](https://github.com/neel-middleware) - Neel Shah  | ||
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