MCTS單項(xiàng)選擇題每日一練(2019.04.23)

You are creating a custom control. The UI of the control must contain several text boxes and two buttons. The control must be available in the global assembly cache for reuse across multiple Web applications. You need to achieve this functionality by using the minimum amount of code.
What should you do? （）

You are developing a Windows Communication Foundation (WCF) service.One of the service operations contains the following code.private static int counter = 0;[OperationContract]public void IncrementCount(){ counter++;}You need to set a service behavior that prevents two or more threads from incrementing the counter variable at the same time.
Which code segment should you use to set the service behavior?（）

You have a Windows Server 2008 R2 Hyper-V server. You need to ensure that you are prompted to specify a custom snapshot name when you create a snapshot.
What should you use to create the snapshot？（）