Content by bill wagner (3)

Bill Wagner introduces the C# 15 preview shipping with .NET 11 Preview 7, highlighting the biggest language changes and what they mean in real code: union types, closed hierarchies, a preview redesign of unsafe/memory-safety rules, plus updates to collection expressions, extension members, and loop control flow.

Bill Wagner introduces union types in C# 15, explaining the new `union` keyword, how it enables exhaustive pattern matching over a closed set of case types, and how to try the feature today using .NET 11 Preview 2 with `preview`.

Bill Wagner introduces the key features of C# 14 shipped with .NET 10, emphasizing extension members, productivity boosters, and performance enhancements for developers.