Today, we are excited to announce the fourth preview release of .NET 10 with enhancements across the .NET Runtime, SDK, libraries, C#, ASP.NET Core, Blazor, .NET MAUI, and more. Check out the full release notes linked below and get started today.
This release contains the following improvements.
Libraries
Add Out-of-Proc Trace Support for Activity Events and Links
Rate Limiting Trace Sampling Support
New async Zip APIs
Performance improvement in GZipStream for concatenated streams
Full Release Notes
Runtime
Escape Analysis for Local Struct Fields
Inlining Improvements
Full Release Notes
SDK
No new features added in this preview release.
C#
No new features added in this preview release.
F#
This release you will find updates across the F# language, FSharp.Core standard library, and FSharp.Compiler.Service.
Visual Basic
No new features added in this preview release.
ASP.NET Core & Blazor
JSON Patch with System.Text.Json
Minimal API validation for record types
Generate OpenAPI schemas in transformers
Improved OpenAPI XML documentation support
Access the OpenAPI document with IOpenApiDocumentProvider
OpenAPI.NET updated to Preview.17
JavaScript interop for constructors and properties
Reference a JavaScript function with IJSObjectReference
Blazor WebAssembly runtime diagnostics
Signal Not Found responses using NavigationManager
NavigationManager.NavigateTo no longer throws a NavigationException
QuickGrid method CloseColumnOptionsAsync renamed to HideColumnOptionsAsync
WriteImportMapToHtml renamed to OverrideHtmlAssetPlaceholders
Preload Blazor framework static assets
Blazor WebAssembly Standalone App template updates
Blazor boot manifest merged into dotnet.js
Use WebApplicationFactory with Kestrel for integration testing
Full Release Notes
.NET MAUI
MediaPicker modernization
Nullable Pickers
Full Release Notes
Full list of quality improvements on dotnet/maui GitHub releases.
.NET for Android
Use System.IO.Compression for .apk creation
Reduced download size
Full list of quality improvements on dotnet/android GitHub releases.
.NET for iOS, Mac Catalyst, macOS, tvOS
This release was focused on quality improvements and build performance. A detailed list can be found on dotnet/macios GitHub releases including a list of Known issues.
Windows Forms
This release introduced shared core clipboard functionality with WPF and was focused on several quality and engineering improvements. See the full release notes for details.
Windows Presentation Foundation (WPF)
API Enhancements
Shared Clipboard Code
Fluent Theme Bug Fixes and Enhancements
Performance Improvements
Full Release Notes for details.
Entity Framework Core
Full-text search support on Azure Cosmos DB for NoSQL
Hybrid search
Vector similarity search exits preview
Several small improvements
Full Release Notes
Container Images
No new features added in this preview release.
Get started
To get started with .NET 10, install the .NET 10 SDK.
If you’re on Windows using Visual Studio, we recommend installing the latest Visual Studio 2022 preview, which now includes GitHub Copilot agent mode and MCP server support. You can also use Visual Studio Code and the C# Dev Kit extension with .NET 10.
Join us for .NET 10 Preview 4 Unboxed Live Stream
Join us for a live stream unboxing with the team to discuss what’s new in this preview release, with live demos from the dev team!
.NET 10 Discussions
The team has been making monthly announcements alongside full release notes on the dotnet/core GitHub Discussions and has seen great engagement and feedback from the community.
Stay up-to-date with .NET 10
You can stay up-to-date with all the features of .NET 10 with:
What’s new in .NET 10
What’s new in C# 14
What’s new in .NET MAUI
What’s new in ASP.NET Core
What’s new in Entity Framework Core
What’s new in Windows Forms
What’s new in WPF
Breaking Changes in .NET 10
.NET 10 Releases
Additionally, be sure to subscribe to the GitHub Discussions RSS news feed for all release announcements.
We want your feedback, so head over to the .NET 10 Preview 4 GitHub Discussion to discuss features and give feedback for this release.
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