C# 12 - Quick Reference Deep Knowledge : Use with technology: for comprehensive documentation. Records Pattern Matching (C# 12) Nullable Reference Types Async/Await Patterns LINQ Primary Constructors (C# 12) Collection Expressions (C# 12) Anti-Patterns | Anti-Pattern | Why It's Bad | Correct Approach | |--------------|--------------|------------------| | / | Deadlocks | Use | | | Exceptions lost | Use | | Mutable DTOs | Unexpected mutations | Use types | | No null checking | NullReferenceException | Enable nullable references | | String concatenation in loops | Memory pressure | Use | Quick T…