用ASP.NET对IIS中的虚拟目录进行操作

Dirport.Invoke("AppDelete",true);

dirroot.CommitChanges();

或者：

object[] part = new object[2];

part[0] = "IIsWebVirtualDir";

part[1] = "Webtest";

dirroot.Invoke("Delete",part);

dirroot.CommitChanges();

下面给出相关文章：

Managing virtual directories on multiple IIS sites and servers

http://www.codeproject.com/vb/net/VDirViewer.asp

How to create a virtual directory with C#

http://www.codeproject.com/csharp/virtualdir.asp