ln.types/odb/ng/IStorage.cs

using System;
using System.Collections.Generic;

namespace ln.types.odb.ng
{
    public interface IStorage
    {
        bool Open();
        void Close();
        bool IsOpen { get; }

        Document Load(Guid documentID);
        void Save(Document document);

        IEnumerable<Guid> GetDocumentIDs();
    }
}