gistfile1.cs

public abstract class Query<T> : IQuery<T>
{
    private readonly ISession _session;

    protected Query(ISession session)
    {
        _session = session;
    }

    public abstract T Execute();
}

public interface IQuery<T>
{
    T Execute();
}

public class Venue
{
    public string Name { get; set; }   
}


public class AllVenuesQuery : Query<List<Venue>>
{
    private readonly ISession _session;

    public AllVenuesQuery(ISession session) : base(session)
    {
        _session = session;
    }

    public override List<Venue> Execute()
    {
        return (from v in _session.Linq<Venue>()
                where v.Name != "Maze"
                select v).ToList();
    }
}