WPF Dynamic View Model with Enum Support

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

namespace WpfProxy
{
    public static class Extensions
    {
        public static IEnumerable GetEnumDesciptions(this Type enumType)
        {

            // Can't use generic type constraints on value types,
            // so have to do check like this
            if (enumType.BaseType != typeof(Enum))
                throw new ArgumentException("T must be of type System.Enum");

            Array enumValArray = Enum.GetValues(enumType);
            ArrayList enumValList = new ArrayList(enumValArray.Length);

            foreach (object val in enumValArray)
            {
                Enum e = (Enum)val;
                enumValList.Add(e.GetEnumDescription());
            }

            return enumValList;
        }
        public static Enum GetValueFromDescription(Type type, string description)
        {

            if (!type.IsEnum) throw new InvalidOperationException();
            foreach (var field in type.GetFields())
            {
                var attribute = Attribute.GetCustomAttribute(field,
                    typeof(DescriptionAttribute)) as DescriptionAttribute;
                if (attribute != null)
                {
                    if (attribute.Description == description)
                        return (Enum)field.GetValue(null);
                }
                else
                {
                    if (field.Name == description)
                        return (Enum)field.GetValue(null);
                }
            }
            throw new ArgumentException("Not found.", "description");
            // or return default(T);
        }

        public static string GetEnumDescription(this Enum enumObj)
        {
            FieldInfo fieldInfo = enumObj.GetType().GetField(enumObj.ToString());

            object[] attribArray = fieldInfo.GetCustomAttributes(false);

            if (attribArray.Length == 0)
            {
                return enumObj.ToString();
            }
            else
            {
                DescriptionAttribute attrib = attribArray[0] as DescriptionAttribute;
                return attrib.Description;
            }
        }
    }
}