ValidateModelNotNullAttribute

The ValidateModelNotNullAttribute will throw an ArgumentNullException if the model in a request is null, it saves having to write if (model == null) { throw new ArgumentNullException("model"); } at the start of every action.

You may not want the attribute to apply to a certain action, therefore the ValidateModelNotNullAttribute has a SkipValidation property (false by default) which allows you to opt out individual actions.

[ValidateModelNotNull(SkipValidation = true)] // will only affect the action it is applied to
public HttpResponseMessage Edit(int id, Model model) { ... }