modern-csharp-coding-standards

To refactor legacy C# code, apply modern coding standards by replacing mutable classes with `record` types for immutability and adopting pattern matching for cleaner conditional logic. This refactoring process improves both execution performance and code maintainability.

The best way to optimize C# performance is using `Span<T>` and `Memory<T>` to minimize memory allocations during data processing. These structures enable high-performance execution by providing safe, managed access to contiguous memory regions without copying.

You implement immutability and type safety in C# 12 by utilizing `record` types with `init`-only properties for safer data handling, enabling nullable reference types, and creating value objects. This functional-style approach ensures robust, predictable application behavior.

Modern C# coding standards fully support `async/await` patterns to optimize execution in high-performance applications. Properly implemented asynchronous patterns prevent thread blocking, maximizing throughput and responsiveness during I/O operations.

Use `record struct` for value objects when you need value-type semantics and allocation-free performance in performance-critical paths. Use reference-type `record` for larger objects or when sharing immutable data across scopes to avoid unnecessary memory copying.