递归读取路径

public void GetDir(string dir)
{
DirectoryInfo di = new DirectoryInfo(dir);
for (int i = 0; i < di.GetFiles().Length; i++)
{
Response.Write(di.GetFiles()[i].FullName+"<br>");
}
if (di.GetDirectories().Length > 0)
{
for (int j = 0; j < di.GetDirectories().Length; j++)
{
GetDir(di.GetDirectories()[j].FullName);
}
}
}