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Dive into the new features of C# 13, running on the .NET 9 Preview SDK, including `params` collections, improved `lock` semantics, UTF-8 string literals, and more. This article provides practical examples for each feature, showing how these updates can enhance your C# development experience. Learn how to apply these features in your projects, from method group improvements to enabling `ref` struct types in generics, and explore the powerful new tools available in the latest preview.