Web API - Bad Request when Model State is Invalid

When you using Web API, would you like to always return a 400 (bad request) response whenever the model state is invalid? It is easy, just add the following filter attribute to your global list:

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, 

    AllowMultiple = false, 

    Inherited = true)]

public class InvalidModelStateFilterAttribute : ActionFilterAttribute

{

    public override void OnActionExecuting(HttpActionContext actionContext)

    {

        if (!actionContext.ModelState.IsValid)

        {

            actionContext.Response = actionContext.Request.CreateErrorResponse(

                HttpStatusCode.BadRequest, 

                actionContext.ModelState);

        }

    }

}

Enjoy,
Tom