Return validation errors instead of an exception for HttpRequestValidation errors

HtmlRequestValidationModelBinder.cs

    public class HtmlRequestValidationModelBinder : DefaultModelBinder
    {
        public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
        {
            try
            {
                return base.BindModel(controllerContext, bindingContext);
            }
            catch (HttpRequestValidationException)
            {
                var modelState = new ModelState();
                modelState.Errors.Add(string.Format("'{0}' contains invalid characters", bindingContext.ModelMetadata.DisplayName ?? bindingContext.ModelMetadata.PropertyName));
                modelState.Value = bindingContext.GetValueFromValueProvider(false);
                bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
            }
            return null;
        }
        
    }