serializing IDictionary via XmlSerializer

DictionaryXmlSerialization.cs

/// <summary>
/// System.Collections.Generic.KeyValuePair has not setters so we have to roll our own in order to serialize.  
/// </summary>
[Serializable]
[XmlType(TypeName = "KVP")]
public struct SerializableKeyValuePair<K, V>
{
   public K Key { get; set; }
   public V Value { get; set; }
}

public static class DictionaryExt
{
   public static SerializableKeyValuePair<object, object>[] ToSerializableKeyValuePairs(this IDictionary dict)
   {
      var list = new List<SerializableKeyValuePair<object, object>>();
      if (dict != null)
      {
         foreach (DictionaryEntry entry in dict)
         {
            list.Add(new SerializableKeyValuePair<object, object> { Key = entry.Key, Value = entry.Value });
         }
      }
      return list.ToArray();
   }

   public static void FromSerializableKeyValuePairs(this IDictionary dict, IEnumerable<SerializableKeyValuePair<object, object>> items)
   {
      if (items != null)
      {
         foreach (var pair in items)
         {
            dict.Add(pair.Key, pair.Value);
         }
      }
   }
}

// and then to use ...
      private OrderedDictionary _myDictionary;

      [XmlIgnore]
      public OrderedDictionary MyDictionary
      {
         get { return _myDictionary ?? (_myDictionary = new OrderedDictionary()); }
         set { _myDictionary = value; }
      }


      /// <summary>
      /// Proxy to provide XML serialization of MyDictionary.
      /// </summary>
      [XmlElement("MyDictionary")]
      public SerializableKeyValuePair<object, object>[] MyDictionaryXmlProxy
      {
         get
         {
            return MyDictionary.ToSerializableKeyValuePairs();
         }

         set
         {
            MyDictionary = new OrderedDictionary();
            MyDictionary.FromSerializableKeyValuePairs(value);
         }
      }