类的继承关系在用XML在网页上以图展示出来，在线等

有两个问题：我DLL库中有N个关系类，首先要判断这些类的相互继承关系；
然后，得之这些相互继承关系后，要用XML以图表形式展示出来，如VS2010中关系类图一样。
拜托帮忙回答下啊，只回答其中一个也可以，多谢多谢了。

VB.NET code

 Dim ts As System.Type = ht
                    Dim tt As System.Type = ht
                    For Each ts In type
                        For Each tt In type
                            If (ts.IsSubclassOf(tt)) Then
                                Dim xmlelem As XmlElement = xmlwriter.CreateElement("BrainData")
                                Dim Links As XmlElement = xmlwriter.CreateElement("Links")
                                xmlelem.AppendChild(Links)

                                Dim Link As XmlElement = xmlwriter.CreateElement("Link")
                                xmlelem.AppendChild(Link)

                                Dim guid As XmlElement = xmlwriter.CreateElement("guid")
                                Dim idA As XmlElement = xmlwriter.CreateElement("idA")
                                Dim idB As XmlElement = xmlwriter.CreateElement("idB")
                                xmlelem.AppendChild(guid)
                                xmlelem.InnerText = "tt_ts"
                                xmlelem.AppendChild(idA)
                                xmlelem.InnerText = "tt"
                                xmlelem.AppendChild(idB)
                                xmlelem.InnerText = "ts"

                            End If
                        Next
                    Next

我这样写的，代码完全不起作用呀，请高手赐招哦，欢迎顶帖，顶帖有分