"Every Class Should Be Sealed in C#"

Summary

The transcript discusses the recommendation of sealing classes or records by default in software development, focusing on the intent behind the practice rather than performance benefits. The speaker agrees with this advice, particularly for library development, emphasizing that sealing classes communicates a clear contract between library authors and users about code extensibility. John Kit and languages like Kotlin are referenced as supporting this approach, with the key takeaway being that developers should seal classes by default unless inheritance is explicitly required, primarily to communicate clear design intent.