modern-csharp-coding-standards

Modern C# coding standards enforce immutability by requiring records and readonly structs for domain models and DTOs, ensuring stable and testable data structures. Using readonly record structs creates explicit value objects with built-in equality.

Zero-allocation patterns in high-performance C# apps utilize Span<T> and Memory<T> to safely manage memory without allocating on the heap. These constructs enable efficient processing of contiguous memory regions while maintaining type safety.

Nullable reference types in C# refactoring require explicit nullability discipline to prevent NullReferenceExceptions. Enabling nullable context forces developers to annotate reference types, creating clear boundaries for APIs and ensuring type safety.

Pattern matching improves C# API design by replacing complex conditional logic with expressive type checks and data extraction. Modern C# applies pattern matching to create clear abstractions and stable boundaries, favoring composition over inheritance.

Async programming in .NET should be used for I/O-bound operations to improve application responsiveness, but requires robust async/await usage to avoid deadlocks. Avoid async void methods and ensure proper ConfigureAwait usage in library code.

Modern C# standards favor composition over inheritance to build flexible domain models and APIs. By combining immutable records and explicit value objects, developers create stable abstractions without the fragility of deep inheritance hierarchies.