调用父类的构造方法并获取返回值

Question

我有一个名为 iParser 的接口，该接口由 AbstractParser 实现，现在我继承了此类。

我处理了一个字符串并在Abstract类中获取了 parts 。如何在子类 ImageParser 中获取返回值？

interface iParser
{
    RepositoryItem GetRepositoryItem(CustomRowCellEditEventArgs e);
}

public abstract class AbstractParser:iParser
{
    String[] parts;
    Dictionary<int, RepositoryItem> riObjectCache = new Dictionary<int, RepositoryItem>();
    public AbstractParser(String iDecodeStr)
    {
        parts = SimpleParser.parseCommandLine(iDecodeStr);
    }

    public RepositoryItem GetRepositoryItem(CustomRowCellEditEventArgs e)
    {
        throw new NotImplementedException();
    }
}

class ImageParser : AbstractParser
{
    Dictionary<string, string> dict = new Dictionary<string, string>();
    Dictionary<string, Bitmap> newdict = new Dictionary<string, Bitmap>();
    string defaultvalue = null;
    public ImageParser(string istring) : base(istring)
    {