public IHttpActionResult Get(ODataQueryOptions<Client> options)
{
    IQueryable queryNew = ODataDynamicPropertyUtilities.ConvertQueryToJsonData<Client>(options.ApplyTo(db.Clients.Include(p => p.ClientTags).ThenInclude(q => q.Tag)));

    if (queryNew.ElementType == typeof(Client))
    {
        var results = queryNew.Cast<Client>().ToList();
        return Ok(results);
    }
    else //if (queryNew.ElementType.Name == "SelectSome`1")
    {
        var results = new List<Client>();
        foreach (var item in queryNew)
        {
            var temp = (Client)item;
            results.Add(temp);
        }

        return Ok(results);
    }
}