New in .NET 10.0 [1]: Start of the new blog series

Contents

This post marks the beginning of the new blog series on .NET 10.0. As in previous years for .NET 8.0 and .NET 9.0, I will present the innovations in .NET 10.0 in numerous smaller posts.

The Dotnet Doctor – Holger Schwichtenberg

Dr. Holger Schwichtenberg is the technical director of the expert network www.IT-Visions.de, which supports numerous medium-sized and large companies with consulting and training services as well as software development, drawing on the expertise of 53 renowned experts. Thanks to his appearances at numerous national and international conferences, as well as more than 90 specialist books and over 1,500 specialist articles, Holger Schwichtenberg is one of the best-known experts for .NET and web technologies in Germany.

.NET 10.0 has been available for free on the download page since November 11, 2025. For .NET 10.0, developers require the Visual Studio development environment in version 2026 (alias 18.0), which was also released on November 11, 2025.

Development of .NET 10.0

.NET 10.0 has been developed over the past 12 months. Since then, Microsoft has released seven preview versions and two release candidate versions:

• Preview 1: 25.02.2025
• Preview 2: 18.03.2025
• Preview 3: 10.04.2025
• Preview 4: 12.05.2025
• Preview 5: 10.06.2025
• Preview 6: 15.07.2025
• Preview 7: 12.08.2025
• Release Candidate 1: 09.09.2025
• Release Candidate 2: 14.10.2025
• Release to Manufacturing (RTM): 11.11.2025

Content of this Blog Series

In the coming weeks and months, my series will report on the following aspects of .NET 10.0:

• New language features in the C# 14.0 programming language
• New features in the .NET 10.0 Software Development Kit (SDK)
• New and extended classes in the .NET 10.0 class library

Goals of the Blog Series

My posts do not claim to replace or surpass the documentation. Readers can understand my posts as a stimulus to decide whether an innovation makes sense for their use cases and whether they want to explore it further.

I will write the posts in the series sufficiently in advance to ensure weekly publication. However, due to bottlenecks in the heise developer editorial team, which reviews and approves my posts, it may occasionally happen that no post appears in a given week.

(kbe)