ValidateModelStateAttribute - adds handing invalid model state and returns BadRequest (400)

ValidateModelStateAttribute.cs

  public class ValidateModelStateAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext context)
        {
            if (!context.ModelState.IsValid)
            {

                context.Result = new BadRequestObjectResult(context.ModelState);
            }

            base.OnActionExecuting(context);
        }
    }