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Microsoft Introduces WinApp CLI to Unify Windows App Development Workflows
In January 2026, Microsoft announced the public preview of the WinApp CLI, a new command-line tool intended to consolidate common Windows application development tasks into a single interface. The tool is available as open source and targets developers working across frameworks such as .NET, C++, Electron, and Rust.
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.NET 11 Preview 2 Updates MAUI with Performance Improvements and Platform Refinements
.NET 11 Preview 2 introduces a set of targeted updates to .NET Multi-platform App UI (MAUI), focusing on the Map control, binding performance, and API consistency. The changes are incremental but concrete, addressing specific usability and performance issues in XAML, data binding, and control behaviour.
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.NET 11 Preview 2 Brings Performance Gains, Improved Mapping, and Native OpenTelemetry Support
Microsoft has released the second preview of .NET 11, featuring native OpenTelemetry tracing for ASP.NET Core, major Map control improvements and faster bindings in .NET MAUI, Blazor TempData support, a new Web Worker project template, and performance improvements across the runtime, SDK, and libraries.
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Uno Platform 6.5 Released with AI Agent Support, Unicode Text, and Studio Improvements
Uno Platform 6.5 introduces Antigravity AI agent support, allowing agents to verify app behavior at runtime. Hot Design now launches by default with a redesigned toolbar and new scope selector. The release also adds Unicode TextBox support for non-Latin scripts, improves WebView2 on WebAssembly, and resolves over 450 community issues across all supported platforms.
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Microsoft Launches MCP C# SDK v1.0, Bringing Full Support for Latest Protocol Specification
Microsoft has released version 1.0 of the official MCP C# SDK, bringing full support for the 2025-11-25 MCP Specification. The release introduces enhanced authorization flows, icon support for tools and resources, incremental scope consent, URL mode elicitation, tool calling in sampling, and improved handling of long-running HTTP requests.
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Microsoft Open Sources Evals for Agent Interop Starter Kit to Benchmark Enterprise AI Agents
Microsoft's Evals for Agent Interop is an open-source starter kit that enables developers to evaluate AI agents in realistic work scenarios. It features curated scenarios, datasets, and an evaluation harness to assess agent performance across tools like email and calendars.
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ASP.NET Core in .NET 11 Preview 1 Brings New Blazor Components, Improved Navigation, and WebAssembly
Microsoft has released ASP.NET Core in .NET 11 Preview 1, introducing new Blazor components like EnvironmentBoundary, Label, and DisplayName, along with relative URI navigation, QuickGrid row click events, IHostedService support in WebAssembly, environment variable configuration, OpenAPI binary file response schemas, and automatic dev certificate trust in WSL.
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Microsoft Agent Framework RC Simplifies Agentic Development in .NET and Python
Microsoft has announced that the Microsoft Agent Framework has reached Release Candidate status for both .NET and Python. This milestone indicates that the API surface is stable and feature-complete for what is planned in version 1.0, setting the stage for an upcoming general availability release.
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.NET 11 Preview 1 Arrives with Runtime Async, Zstandard Support, and C# 15 Features
NET 11 Preview 1 is released, featuring Runtime Async as the headline change, moving async method handling from the compiler into the runtime itself. The preview also brings CoreCLR WebAssembly work, native Zstandard compression, C# 15 collection expression arguments, and MAUI improvements. Community reaction has been mixed, with praise for async changes but debate over language complexity.
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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.