使用NHibernate的ASP.NET - 如何获取刚刚在回发时插入的实体的ID

public virtual T Save<T>(T entity) where T : class
{
    using (var session = _sessionFactory.OpenSession())
    {
        using (var transaction = session.BeginTransaction())
        {
            var savedEntity = session.Save(entity);
            transaction.Commit();
            return savedEntity;
        }
    }
}

var entity = new Entity();
// 设置实体属性
var savedEntity = Save(entity);
var id = savedEntity.Id;

ViewState["EntityId"] = id;

Session["EntityId"] = id;

var entityId = Convert.ToInt32(ViewState["EntityId"]);

var entityId = Convert.ToInt32(Session["EntityId"]);