green.cs

        public class InputQueryModel : InputCommandModel
        {
        }

        public class InputCommandModel
        {
            public string Name { get; set; }
        }


        [Test]
        public void smoke()
        {
            var typeDescriptorCache = new TypeDescriptorCache();
            var accessorRules = new AccessorRules();
            accessorRules.Add<InputCommandModel>(x => x.Name, new RequiredFieldRule());

            // GREEN, reports 1 element
            typeDescriptorCache.GetPropertiesFor<InputCommandModel>()
                .Select(keyValuePair => keyValuePair.Value)
                .Select(property => new SingleProperty(property))
                .SelectMany(accessorRules.AllRulesFor<IFieldValidationRule>)
                .ShouldHaveCount(1); 
        }

red.cs

        public class InputQueryModel 
        {
            public string Name { get; set; }
        }

        public class InputCommandModel : InputQueryModel
        {
        }


        [Test]
        public void smoke()
        {
            var typeDescriptorCache = new TypeDescriptorCache();
            var accessorRules = new AccessorRules();
            accessorRules.Add<InputCommandModel>(x => x.Name, new RequiredFieldRule());

            // RED, reports 0 elements
            typeDescriptorCache.GetPropertiesFor<InputCommandModel>()
                .Select(keyValuePair => keyValuePair.Value)
                .Select(property => new SingleProperty(property))
                .SelectMany(accessorRules.AllRulesFor<IFieldValidationRule>)
                .ShouldHaveCount(1); 
        }