public Table[] Get(int idParam, DateTime dateParam)
{
return session.QueryOver<Table>()
      .Where(x => x.Date.Date == dateParam.Date && x.Id == idParam)
      .List().ToArray();
}

public partial class Table
{
    public virtual DateTime Date { get; set; }
    public virtual int Id { get; set; }
}

return session.QueryOver<Table>()
	.Where(
		Restrictions.Eq(
		Projections.SqlFunction("date", NHibernateUtil.DateTime, Projections.Property<Table>(item => item.Date)), dateParam))
        .And(x => x.Id == idParam)
	.List().ToArray();