NHibernate和重写属性

首先,我要说的是,我是nHibernate的新手,所以如果答案显而易见,请原谅我。 我有一个抽象基类,它的所有成员都是抽象的。

public abstract class BallBase
{
  public abstract RunsScored { get; }
  public abstract IsOut { get; }
  public abstract IsExtra { get; }
  public abstract GetIncrement();

}

public class WideBall : BallBase
{
  public override RunsScored
  {
    private int m_RunsScored = 1;

    public WideBall(): base()
    { }

    public WideBall(int runsScored) : base()
    {
        m_RunsScored = runsScored;
    }

    public  override int RunsScored
    {
        get
        {
            return m_RunsScored;
        }
    }

    public  override bool IsOut
    {
        get
        {
            return false;
        }
    }

    public  override bool IsExtra
    {
        get
        {
            return true;
        }
    }

    public  override int GetIncrement()
    {
        // add 0 to the balls bowled in the current over
        // a wide does not get added to the balls bowled
        return 0;
    }

  }

}

我想使用nHibernate来持久化具体的类,但显然,该类的所有公共成员都需要是虚拟的。 有没有办法继续我的基类方法?