以下代码会产生错误:Error:'CERas.CERAS'isa'type',whichisnotvalidinthegivencontext为什么会出现这个错误？usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;namespaceWinApp_WMI2{publicpartialclassForm1:Form{publicForm1(){InitializeComponent();}privatevoidForm1_Load(objectsender,EventArgse){