getterdelegates.cs

private static Func<T, object> CreatePropertyGetter(PropertyInfo propertyInfo)
{
    if (typeof(T) != propertyInfo.DeclaringType)
        throw new ArgumentException();

    var instance = Expression.Parameter(propertyInfo.DeclaringType, "i");
    var property = Expression.Property(instance, propertyInfo);
    var convert = Expression.TypeAs(property, typeof(object));
    return (Func<T, object>)Expression.Lambda(convert, instance).Compile();
}