Microsoft Finally Fixed Inheritance in C# 15

Name: Microsoft Finally Fixed Inheritance in C# 15
Uploaded: 2026-11-06T12:06:13+00:00
Description: Nick Chapsas introduces closed hierarchies, a new feature described as coming to C# 15 and .NET 11. He discusses how it addresses problems with inheritance...

Today by Nick Chapsas

Nick Chapsas explains closed hierarchies and their role in making C# inheritance safer, both for developers writing code directly and for coding agents.

Closed hierarchies in C# 15

The video presents closed hierarchies as a new feature coming to C# 15 and .NET 11. Chapsas discusses the inheritance problems the feature addresses and why he considers it an important improvement for writing safer code.

The focus is on how closed hierarchies change the way developers work with inheritance, with benefits also extending to code produced by agents.

Downloadable resource

Chapsas provides a companion C# 15 skill download.