Introduction

The oehen.arguard is a .NET extension nuget library package for argument validation.

Advantages

What is the benefit to validate parameters of public methods?

• It identifies exactly what parameter of a method are incorrect.
• It makes the code fail on invalid input even if some other condition means that the value isn't dereferenced.
• It makes the exception occur before the method could have any other side-effects you might reach before the first dereference.
• It means you can be confident that if you pass the parameter into something else, you're not violating their contract.
• It documents your method's requirements with source code.
• Throw a ArgumentNullException instead NullReferenceException can help to find the responsible part is something with the parameter value.
• Parameter validation is expected by various code analysis systems.

Implementation

All validation implementations are extended methods starting with [argument].Throw... corresponded of the argument datatype.