Microsoft officially releases .NET 10 Preview 1: Opening a new chapter of the next generation development framework

On February 25, 2025, the .NET team announced the official release of .NET 10 Preview 1 on their blog. For the article, please see:/dotnet/dotnet-10-preview-1/, marking an important step forward in the field of cross-platform development. This new version has brought significant improvements and strengths in many aspects such as .NET Runtime, SDK, library, C#, Core, Blazor, and .NET MAUI. As the successor of .NET 9, this preview continues the core direction of performance optimization and AI integration, while bringing developers more forward-looking features. This latest iteration of this cross-platform open source framework integrates cutting-edge AI toolchain, deep cloud native optimization, and breakthrough performance improvements, bringing new technological paradigms to more than 5 million .NET developers around the world.
The main highlights of .NET 10 Preview 1 include:

Library enhancement:

It provides the function of finding certificates through non-SHA-1 fingerprints, and supports finding PEM-encoded data in ASCII/UTF-8.

Added new method overloads for ISOWeek of DateOnly type, introduced a string normalization API that handles character spans, and a number sorting feature for string comparisons.

Improved the performance and memory usage of ZipArchive, added more TryAdd and TryGetValue overloads for OrderedDictionary<TKey, TValue>, and added left-handed matrix transformation method.

Runtime optimization:
Devirtualization of array interface methods is introduced, stack allocation of value type arrays is supported, and support for AVX10.2 is added.

SDK improvements:
The framework provides package references to improve build efficiency and compatibility.

C# language update:
Support nameof in unbound generics, implement implicit scope conversion, add field-based attribute support, allow modifiers to be used on simple lambda parameters, and introduce experimental functions - string literals in data segments quantity.

Core & Blazor：
Supports OpenAPI 3.1, can generate OpenAPI documents in YAML format, improves integration testing with top-level statement applications, and adds static web asset support for Blazor scripts.

.NET MAUI quality improvement:
Focus on quality improvements in .NET MAUI, including the enhancements of CollectionView on iOS and Mac Catalyst.

Android, iOS, macOS and tvOS support:
Added support for Android 16 (Baklava) Beta 1, improved compatibility with JDK-21, and trimmer warning is enabled by default.

Windows Forms and WPF:
In terms of Windows Forms, the clipboard-related serialization and deserialization have been changed, and a new clipboard API has been introduced. WPF focuses on quality improvement, and you can refer to the release instructions for details.

Entity Framework Core：
Supports the LeftJoin operator for .NET 10, ExecuteUpdateAsync now accepts plain non-expression lambdas.

Installation and experience of .NET 10 Preview 1

To experience the new features and improvements brought by .NET 10 Preview 1, users can download and install the .NET 10 SDK:/download/dotnet/10.0. For developers using Windows and Visual Studio, it is recommended to install the latest Visual Studio 2022 preview. In addition, Visual Studio Code and C# Dev Kit extensions also support .NET 10.

Microsoft also invited developers to participate in the .NET 10 Preview 1 live broadcast event to explore new features of this preview with the team, and watch live demonstrations of the development team.

Future Development of .NET 10

The Microsoft team will continue to bedotnet/core GitHub DiscussionsPost monthly announcements and complete release notes on the previous page, and interact closely with the community to gather feedback. Developers can get the latest updates on .NET 10 by subscribing to the GitHub Discussions RSS news feed and head to .NET 10 Preview 1 GitHub Discussion to discuss new features and provide feedback.
With the official release of .NET 10 Preview 1, the cross-platform development field will usher in broader development prospects. We look forward to developers taking full advantage of this new version to build more efficient, powerful and modern applications.

Microsoft officially releases .NET 10 Preview 1: Opening a new chapter of the next generation development framework

Runtime optimization:Devirtualization of array interface methods is introduced, stack allocation of value type arrays is supported, and support for AVX10.2 is added.

SDK improvements:The framework provides package references to improve build efficiency and compatibility.

C# language update:Support nameof in unbound generics, implement implicit scope conversion, add field-based attribute support, allow modifiers to be used on simple lambda parameters, and introduce experimental functions - string literals in data segments quantity.

Core & Blazor： Supports OpenAPI 3.1, can generate OpenAPI documents in YAML format, improves integration testing with top-level statement applications, and adds static web asset support for Blazor scripts.

.NET MAUI quality improvement:Focus on quality improvements in .NET MAUI, including the enhancements of CollectionView on iOS and Mac Catalyst.

Android, iOS, macOS and tvOS support:Added support for Android 16 (Baklava) Beta 1, improved compatibility with JDK-21, and trimmer warning is enabled by default.

Windows Forms and WPF:In terms of Windows Forms, the clipboard-related serialization and deserialization have been changed, and a new clipboard API has been introduced. WPF focuses on quality improvement, and you can refer to the release instructions for details.

Entity Framework Core： Supports the LeftJoin operator for .NET 10, ExecuteUpdateAsync now accepts plain non-expression lambdas.