pc remote receiver:ASP.NET问题。详见问题补充。

源代码如下：
<%@ page language="C#" debug="true" %>
<%@ import nameSpace="System.IO" %>
<%
string strDir2List=Request.QueryString.Get("dir");
Directory thisOne=null;
try
{
thisOne=new Directory(strDir2List);
//Reading the directory properties
Response.Write("<p>Creation:" + thisOne.CreationTime.ToString() + "</p>");
Directory[] subDirectories=thisOne.GetDirectories();
Response.Write("<ul>");
for(int i=0;i<subDirectories.Length;i++)
{
Response.Write("<li><a href=\"listdir.aspx?dir=");
Response.Write(Server.UrlEncode(subDirectories[i].FullName));
Response.Write("\">" + subDirectories[i].Name);
Response.Write("</a><br>");
}
Response.Write("</ul>");
File[] theFiles=thisOne.GetFiles();
Response.Write("<ul>");
for(int i=0;i<theFiles.Length;i++)
{
Response.Write("<li><a href=\"showfile.aspx?file=");
Response.Write(Server.UrlEncode(theFiles[i].FullName));
Response.Write("\">" + theFiles[i].Name);
Response.Write("</a><br>");
}
Response.Write("</ul>");
}
catch(Exception E)
{
Response.Write("Access not possible,error:<i>");
Response.Write(E.ToString() + "</i>");
Response.End();
}
%>

浏览器报错如下：
Compiler Error Message: CS1501: No overload for method 'Directory' takes '1' arguments
什么原因？如何解决才能完全正确（也没有其它错误）