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Dev Proxy v2.1 Introduces Configuration Hot Reload and Stdio Traffic Proxying
The Dev Proxy team has released Dev Proxy version 2.1, introducing new features aimed at improving developer productivity and simplifying local testing workflows. This release focuses on faster iteration, better support for modern development tools, and several refinements across the proxy and its related tooling.
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Microsoft Ships OData .NET (ODL) 9.0.0 Preview 3: Safety, Modern APIs, and Spec Compliance
Microsoft released OData .NET (ODL) 9.0.0 Preview 3, the latest preview iteration of the OData .NET client and core libraries, continuing the modernisation effort of the library. This preview focuses on safer default behaviours, runtime API cleanup, and closer conformance with the OData specification as the team works toward a stable 9.x release.
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Microsoft Adds Custom Copilot Agents for .NET Developers with C# and WinForms Experts
Microsoft and GitHub have expanded the Copilot ecosystem with the first .NET-focused GitHub Copilot custom agents, designed to improve productivity and code quality for C# and Windows Forms developers. The announcement, part of the broader Copilot custom agents’ rollout, introduces two purpose-built agents: C# Expert and WinForms Expert in the form of agent instruction Markdown files.
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.NET 10 Becomes Available on AWS Lambda as Managed Runtime and Base Image
Amazon Web Services has announced that AWS Lambda now supports the creation of serverless applications using .NET 10. With this update, developers can use .NET 10 both as a managed runtime and as a container-based image when building and running Lambda functions.
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Aspire 13.1 Brings MCP Integration, CLI Enhancements, and Azure Deployment Updates
Aspire 13.1 has been released as an incremental update that builds on the polyglot platform foundation introduced with Aspire 13. The release focuses on improving developer productivity through enhancements to the command-line interface, deeper support for AI-assisted development workflows, refinements to the dashboard experience, and clearer deployment behavior for Azure-based environments.
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Microsoft Open Sources XAML Studio, Reviving a Longstanding Prototyping Tool
Microsoft has officially open-sourced XAML Studio, a lightweight rapid prototyping tool for XAML-based UI development, under the .NET Foundation. The tool, originally released through the Microsoft Store as part of the Microsoft Garage initiative, now welcomes community contributions and collaboration via its GitHub repository.
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SharePoint Framework 1.22 Ships with Heft-Based Build Toolchain and Refreshed Project Baseline
Microsoft has announced the general availability of SharePoint Framework (SPFx) version 1.22, a release centered on modernising the build and tooling experience for SPFx developers. This shift marks a foundational update to how SPFx solutions are built, aimed at addressing technical debt, improving extensibility, and aligning with broader Microsoft toolchain standards.
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Visual Studio 2026 Released with AI-Native IDE and Performance Boost
Microsoft has officially launched Visual Studio 2026 (version 18), marking what they call the first ‘AI‑native’ release of its flagship integrated development environment. The general availability rollout follows extensive validation via the Insiders channel and reflects a blend of performance optimisations, deep GitHub Copilot integration, and tooling updates across core languages and workloads.
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ASP.NET Core in .NET 10: Major Updates across Blazor, APIs, and OpenAPI
Microsoft has detailed the major updates to ASP.NET Core arriving as part of last month's .NET 10 release. As reported, this version delivers extensive improvements across Blazor, Minimal APIs, OpenAPI generation, authentication, and general framework performance.
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Aspire 13 Delivers Multi-Language Support and Significant Enhancements Across the Platform
Aspire 13 has been released as a major milestone in the platform's evolution. As reported by the team, Aspire is no longer branded as “.NET Aspire” and is now positioned as a full polyglot application platform. According to the announcement, version 13 brings first-class support for Python and JavaScript alongside existing .NET capabilities, marking a significant shift forward.
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Uno Platform 6.4 and Uno Platform Studio 2.0: .NET 10, VS2026 and Agentic AI
The Uno Platform team has simultaneously rolled out two significant updates: version 6.4 of the platform framework and version 2.0 of its premium tooling, Uno Platform Studio. Released on November 11th, 2025, these updates bring official support for .NET 10 and Visual Studio 2026, along with a new era of AI‑assisted, ‘agentic’ development features.
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F# 10 Brings Performance Improvements
The release of .NET 10 brings with it F# version 10. It’s a refinement‑focused update that enhances the language’s ergonomics, improves performance, and optimises compiler behaviour for everyday functional development.
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.NET 10 Improves MAUI Quality and Performance
At the launch of .NET 10, .NET MAUI receives a suite of updates focused on quality, performance and developer productivity. While no new big UI changes are there, the enhancements fill in missing details in cross‑platform workflows and refine long‑standing platform behaviour issues.
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.NET 10 Officially Released with Major Performance, AI, and Developer Experience Improvements
Microsoft announced the general availability of .NET 10, describing it as the most productive, modern, secure, and high-performance version of the platform to date. As stated by the company, the release is the result of a year-long effort involving thousands of contributors. It includes improvements across the runtime, libraries, languages, tools, frameworks, and workloads.
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Microsoft Patches Critical ASP.NET Core Vulnerability with 9.9 Severity Score
Microsoft recently released a security advisory and patched a critical vulnerability in ASP.NET Core that allows an attacker to bypass a security feature over a network due to an inconsistent interpretation of HTTP requests. With a CVSS score of 9.9 out of 10, CVE-2025-55315 is the highest-rated Microsoft vulnerability.