Guard

Enables readable validation chains like `.NotNull().NotEmpty()`, directly replacing verbose if-then-throw statements as shown in the constructor example, improving code clarity.

Uses read-only structs passed by reference to minimize heap allocations, making it efficient for high-frequency validation calls in performance-sensitive code.

Supports custom validations via simple extension methods, allowing developers to tailor rules to specific needs without modifying the core library.

Generates standard .NET exceptions (e.g., ArgumentNullException) with consistent parameter names and clear messages, reducing manual error handling boilerplate.