From http://adrianphinney.com/post/18900251364/nhibernate-raw-sql-and-dynamic-result-sets

nhibernate_dynamic_type_results

public static class NhTransformers
{
    public static readonly IResultTransformer ExpandoObject;

    static NhTransformers()
    {
        ExpandoObject = new ExpandoObjectResultSetTransformer();
    }

    private class ExpandoObjectResultSetTransformer : IResultTransformer
    {
        public IList TransformList(IList collection)
        {
            return collection;
        }

        public object TransformTuple(object[] tuple, string[] aliases)
        {
            var expando = new ExpandoObject();
            var dictionary = (IDictionary<string, object>)expando;
            for (int i = 0; i < tuple.Length; i++)
            {
                string alias = aliases[i];
                if (alias != null)
                {
                    dictionary[alias] = tuple[i];
                }
            }
            return expando;
        }
    }
}

public static class NHibernateExtensions
{
    public static IList<dynamic> DynamicList(this IQuery query)
    {
        return query.SetResultTransformer(NhTransformers.ExpandoObject)
                    .List<dynamic>();
    }
}