You are developing a Windows Forms Application by using the .NET Framework 3.5.You plan to design a composite custom control for the application. You include a ListBox control has a property that provides the item count of  the ListBox control. You need to ensure that the property cannot be accessed at design time. Which attribute should you use？（）

A.Override the OnPaint method.
B.Write a code segment to handle the CellPainting event.
C.Write a code segment to handle the CellParsing event.
D.Write a code segment to handle the RowPostPaint event.

A.Create a custom action and set the NoImpersonate property to true
B.Create a custom action and set the NoImpersonate property to false
C.Create a manifest and set the RequestedExecutionLevel level attribute to AsInvoker
D.Create a manifest and set the RequestedExecutionLevel level attribute to AsAdministrator

A.Sign the deployment manifest by using an Authenticode certificate.Publish the application to a CD-ROM.Install the application on each client computer from the CD-ROM
B.Sign the deployment manifest by using an Authenticode certificate.Publish the application to a server on the network.Install the application on each client computer.
C.Add the requestedExecutionLevel="highestAvailable" attribute to the deployment.Publish the application to a server on the network.Install the application on each client computer.
D.Add the requestedExecutionLevel="requiresAdministrator" attribute to the deployment.Publish the application to a server on the network.Install the application on each client computer.