求教个路径问题！！！！！！！！！！！！！！！！！

为什么我用dstCust.WriteXml(Server.MapPath(path))系统提示path路径有问题
但换成dstCust.WriteXml(Server.MapPath( "bin/cs/cs.xml "))就没有问题

Dim objConn As SqlConnection
Dim usern As String = "cs "
Dim path As String = HttpContext.Current.Server.MapPath( "bin/ " + usern + "/cs.xml ")
Dim strSql As String
strSql = "SELECT * FROM test "
objConn = New SqlConnection(ConfigurationManager.AppSettings( "scon "))
Dim sdaCust As New SqlDataAdapter(strSql, objConn)
Dim dstCust As New DataSet()
sdaCust.Fill(dstCust, "test ")
dstCust.WriteXml(Server.MapPath(path))

[解决办法]
Server.MapPath是web应用程序 的根路径
[解决办法]
Dim path As String = HttpContext.Current.Server.MapPath( "bin/ " + usern + "/cs.xml ") dstCust.WriteXml(Server.MapPath(path))用了两次MapPath