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.NET Core 3.0 New APIs

.NET Core 3.0 has just been released, see here the official announcement. In this post we’re going to explain how to list and explore the new APIs introduced since .NET Core 2.2 (this API diff is also available here).

To diff the API versions download NDepend trial, start VisualNDepend.exe, and click Compare 2 versions of a code base.

  • In the Older Build add assemblies in the folder: C:\Program Files\dotnet\shared\Microsoft.NETCore.App\2.2.5
  • In the Newer Build add assemblies in the folder: C:\Program Files\dotnet\shared\Microsoft.NETCore.App\3.0.0

Then click OK. Depending on your hardware it’ll take between a dozen of seconds and a minute to analyze these two versions of .NET Core.

Here are the lists of new APIs obtained:

To obtain these lists we’ve edited 5 code queries and exported their results to HTML. For example to obtain the 28 new namespaces we edited the query:

And got this result, that also lists new types for each new namespace:

.NET Core 3.0 New Namespaces

The 4 others code queries used to list new types, new types and their members and new methods and new fields introduced in existing types are:




My dad being an early programmer in the 70's, I have been fortunate to switch from playing with Lego, to program my own micro-games, when I was still a kid. Since then I never stop programming.

I graduated in Mathematics and Software engineering. After a decade of C++ programming and consultancy, I got interested in the brand new .NET platform in 2002. I had the chance to write the best-seller book (in French) on .NET and C#, published by O'Reilly and also did manage some academic and professional courses on the platform and C#.

Over my consulting years I built an expertise about the architecture, the evolution and the maintenance challenges of large & complex real-world applications. It seemed like the spaghetti & entangled monolithic legacy concerned every sufficiently large team. As a consequence, I got interested in static code analysis and started the project NDepend in 2004.

Nowadays NDepend is a full-fledged Independent Software Vendor (ISV). With more than 12.000 client companies, including many of the Fortune 500 ones, NDepend offers deeper insight and full control on their application to a wide range of professional users around the world.

I live with my wife and our twin kids Léna and Paul in the beautiful island of Mauritius in the Indian Ocean.