a SerializationInfoHelper class that makes it easier to pull values out of SerializationInfo

SerializationInfoHelper.cs

using System;
using System.Collections.Generic;
using System.Runtime.Serialization;

namespace Helpers
{
    public class SerializationInfoHelper
    {
        private readonly SerializationInfo _info;
        private bool _enumerated = false;
        private Dictionary<string, object> _items;

        public SerializationInfoHelper(SerializationInfo info)
        {
            _info = info;
        }

        public T Get<T>(string name)
        {
            Enumerate();
            if (_items.ContainsKey(name))
            {
                return (T)_items[name];
            }

            return default(T);
        }

        public bool Contains(string name)
        {
            Enumerate();
            return _items.ContainsKey(name);
        }

        private void Enumerate()
        {
            if (_enumerated)
                return;

            _items = new Dictionary<string, object>(_info.MemberCount);

            var e = _info.GetEnumerator();
            while (e.MoveNext())
            {
                _items.Add(e.Name, e.Value);
            }

            _enumerated = true;
        }
    }
}