C# news and developer summaries

.NET 11 introduces native 'union' types in C# 15, enabling a type to represent multiple potential values. These structures simplify handling various types via switch expressions with compiler-enforced exhaustiveness. Developers can implement custom, non-boxing versions to optimize performance, marking a significant advancement in C# functional programming capabilities.

C# is evolving its memory safety model to follow patterns similar to Rust and Swift. The new 'unsafe' keyword will serve as a visible, enforceable contract for memory operations rather than just a context marker. This model requires 'unsafe' inner blocks, documented safety obligations, and compiler-enforced propagation, aiming to make memory safety explicit and reviewable by developers and AI.