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 **Runtime Nullables** automatically adds null checks to method/property entry and exit points based on the standard nullable annotations and attributes available in C# 8+. It is capable of checking input parameters as well as outputs (i.e. return values and `out`/`ref` parameters) and supports comprehensive checks on the full range of special method types including asynchronous `Task<T>` methods, `Task<T>` methods that synchronously return completed tasks (i.e. using `Task.FromResult<T>`), `IEnumerable<T>`/`IEnumerator<T>` iterators as well as asynchronous `IAsyncEnumerable<T>`/`IAsyncEnumerator<T>` iterators. Custom throw helpers can be defined to fully customize the exceptions thrown to your liking.