WMI与ServerNetworkProtocol无法正常工作vb.net

Question

我有这段代码，我正在使用WMI在vb.net中获取ServerNetworkProtocol，它不执行任何异常，但mgmtcls.GetInstances（）返回的值不是单个值，是否还有其他问题或是否有任何错误

' Specify server, SQL WMI namespace and class name    
Dim mgmtPath As New ManagementPath()
mgmtPath.Server = "MAIN"
mgmtPath.NamespacePath = "root\Microsoft\SqlServer\ComputerManagement10" 'For SQL 2008    
mgmtPath.ClassName = "ServerNetworkProtocol"
' Get instances of the ServerNetworkProtocol class
Dim mgmtcls As New ManagementClass(mgmtPath)
Dim mgmtColl As ManagementObjectCollection = mgmtcls.GetInstances()
'Enumerates ServerNetworkProtocol info
For Each mgmtObj As ManagementObject In mgmtColl
    Dim svc As String = String.Format("{0}", mgmtObj("Enabled"))
    MsgBox(svc)
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