vb.net的反射之GetType.GetProperties取到数组为空的原因

最近在进行一个介于PLC与MES之间的通讯程序，从PLC读数据再组XML上报MES.

组XML使用了XStream，为了方便使用定义了一个所有成员都公开的类，偷懒吗 所以...

 Public Class PLCInfo
        Public Eqp As String
        Public Fab As String
        Public Area As String
        Public QName As String
        Public PlcIp As String
        Public PlcPort As String
        Public PlcNetNo As String
        Public PlcStation As String
        Public PcNetNo As String
        Public PcStation As String
        Public TRX As String
        Public RefreshTime As String
        Public P_PLCReady As String
        Public P_PCRead As String
        Public P_EqpName As String
        Public P_Chip As String
        Public P_Model As String
        Public isGenChip As String
End Class

因为这是个.xml的配置文件 里面有PLC点位，为了可扩展就想用反射取PLC点位的值，myType.GetProperties都是空的...

   '准备PLC点位资讯
            Dim myType As Type = GetType(BootConf.PLCInfo)
            For Each t As System.Reflection.PropertyInfo In myType.GetProperties
                Dim tagName As String = t.Name
                Dim value As String = t.GetValue(objPlcInfo, Nothing)
                '...
             Next

为啥捏？这么简单的应用不应该有问题啊，各种翻各种找，最后在MSDN看到：

---------------------------------------------------------------------

返回值

表示当前 Type 的所有公共属性 (Property) 的 PropertyInfo 对象数组。 - 或 - 如果当前 Type 没有公共属性 (Property)，则为 PropertyInfo 类型的空数组。

--------------------------------------------------------------------

原来如此 GetProperties取的对象一定要有Property，要取的对象加个Property，搞定

    Public Class PLCInfo
        Public Eqp As String
        Public Fab As String
        Public Area As String
        Public QName As String
        Public PlcIp As String
        Public PlcPort As String
        Public PlcNetNo As String
        Public PlcStation As String
        Public PcNetNo As String
        Public PcStation As String
        Public TRX As String
        Public RefreshTime As String
        Public P_PLCReady As String
        Public P_PCRead As String
        Public Property P_EqpName As String
        Public Property P_Chip As String
        Public Property P_Model As String
        Public isGenChip As String
    End Class