A helper class to extract property-names of ViewModel for MVVM.

PropertyTagMapper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;

namespace Utils {
    [AttributeUsage(AttributeTargets.Property, AllowMultiple=true)]
    public class PropertyTagAttribute : System.Attribute {
        public PropertyTagAttribute(Type inTagType, int inTagValue) {
            if (inTagType == null) {
                throw new NullReferenceException();
            }

            var info = inTagType.GetTypeInfo();

            if (!Enum.IsDefined(inTagType, inTagValue)) {
                throw new ArgumentException("Undefined Enum value");
            }

            this.Tag = (Enum)Enum.ToObject(inTagType, inTagValue);
        }

        public Enum Tag { get; private set; }
    }

    public class PropertyTagMapper {
        private Dictionary<Enum, string[]> mTagMap;

        public PropertyTagMapper(Type inType) {
            mTagMap = (
                inType.GetTypeInfo().DeclaredProperties
                .Where(p => p.CanRead)
                .SelectMany(p => {
                    return p.GetCustomAttributes<PropertyTagAttribute>(true).Select(attr => {
                         return new KeyValuePair<Enum, string>(attr.Tag, p.Name);
                    });
                })
                .GroupBy(pair => pair.Key, pair => pair.Value)
                .ToDictionary(pair => pair.Key, pair => pair.ToArray())
            );
        }

        public string[] ToProprtyNames(Enum inTag) {
            string[] props;

            if (mTagMap.TryGetValue(inTag, out props)) {
                return props;
            }
            else {
                return new string[0];
            }
        }
    }
}