System.Web.Mvc.EnhancedDataAnnotationsModelMetadataProvider.CreateMetadata C# (CSharp) Method

        protected override ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes, Type containerType, Func<object> modelAccessor, Type modelType, string propertyName)
        {
            var displayAttribute = attributes.OfType<global::DisplayNameAttribute>().FirstOrDefault();
            var attrs = attributes;
            var defaultValueAttribute = attributes.OfType<DefaultValueAttribute>().FirstOrDefault();
            //var eitherAttribute = attributes.OfType<EitherAttribute>().FirstOrDefault();
            var htmlEncodeAttribute = attributes.OfType<HtmlEncodeAttribute>().FirstOrDefault();
            //var pageAttribute = attributes.OfType<PageAttribute>().FirstOrDefault();
            var htmlPropertiesAttribute = attributes.OfType<HtmlPropertiesAttribute>().FirstOrDefault();

            if (displayAttribute != null)
            {
                if (!attrs.OfType<System.ComponentModel.DataAnnotations.DisplayAttribute>().Any())
                    attrs = attrs.Concat(new System.ComponentModel.DataAnnotations.DisplayAttribute
                        {
                            Description = GetString(displayAttribute.GetDescription()),
                            AutoGenerateField = displayAttribute.GetAutoGenerateField() ?? true,
                            AutoGenerateFilter = displayAttribute.GetAutoGenerateFilter() ?? true,
                            GroupName = GetString(displayAttribute.GetGroupName()),
                            Name = GetString(displayAttribute.GetName()),
                            Order = displayAttribute.GetOrder() ?? 0,
                            Prompt = GetString(displayAttribute.GetPrompt()),
                            ShortName = GetString(displayAttribute.GetShortName()),
                        }.ToEnumerable());
            }
            var modelData = base.CreateMetadata(attrs, containerType, modelAccessor, modelType, propertyName);
            if (htmlPropertiesAttribute != null)
                modelData.AdditionalValues.Add("HtmlAttributes", htmlPropertiesAttribute);

            if (htmlEncodeAttribute != null)
                modelData.AdditionalValues["HtmlEncodeAttribute"] = htmlEncodeAttribute;
            if (displayAttribute != null)
                modelData.AdditionalValues["DisplayAttribute"] = displayAttribute;
            if (defaultValueAttribute != null)
                modelData.AdditionalValues["DefaultValue"] = defaultValueAttribute.Value;
            //if (pageAttribute != null)
            //    modelData.AdditionalValues["PageAttribute"] = pageAttribute;

            //if (eitherAttribute != null)
            //{
            //    Dictionary<string, ModelMetadata> other;
            //    object otherValue;
            //    if (!modelData.AdditionalValues.TryGetValue("EitherAttribute", out otherValue) || (other = otherValue as Dictionary<string, ModelMetadata>) == null)
            //        modelData.AdditionalValues["EitherAttribute"] = other = new Dictionary<string, ModelMetadata>();
            //    var otherProperty = containerType.GetProperty(eitherAttribute.OtherProperty, Reflection.BindingFlags.Instance | Reflection.BindingFlags.Public | Reflection.BindingFlags.NonPublic);
            //    var eitherAttributes = otherProperty.GetCustomAttributes(true).OfType<Attribute>().ToArray();
            //    var otherPropertyModel = this.CreateMetadata(eitherAttributes, containerType, () => null, modelType, eitherAttribute.OtherProperty);
            //    other[eitherAttribute.OtherProperty] = otherPropertyModel;
            //    if (eitherAttribute.OtherPropertyName == null)
            //        eitherAttribute.OtherPropertyName = otherPropertyModel.GetDisplayName();
            //}
            return modelData;
        }