You are creating a Windows Forms application by using the .NET Framework 3.5. The application requires a thread that accepts a single integer parameter.   
You write the following code segment （Line numbers are included for reference only.）
Thread myThread = new Thread（new ParameterizedThreadStart（DoWork）） ； 
myThread.Start（100）；
You need to declare the method signature of the DoWork method.  
Which method signature should you use？（）

单项选择题You are creating a Windows application for graphical image processing by using the .NET Framework 3.5. You create an image processing function and a delegate.You plan to invoke the image processing function by using the delegate.You need to ensure that the calling thread meets the following requirements：  （1）It is not blocked when the delegate is running   （2）It is notified when the delegate is complete What should you do？（）

A.Call the Invoke method of the delegate.
B.Call the BeginInvoke and EndInvoke methods of the delegate in the calling thread.
C.Call the BeginInvoke method by specifying a callback method to be executed when the delegate is complete.Call the EndInvoke method in the callback method.
D.Call the BeginInvoke method by specifying a callback method to be executed when the delegate is complete.Call the EndInvoke method of the delegate in the calling thread.

单项选择题YouarecreatingaWindowsFormsapplicationbyusingthe.NETFramework3.5.Youcreateanewforminyourapplication.Youadd100controlsatruntimeintheLoadeventhandleroftheform.Usersreportthattheformtakesalongtimetogetdisplayed.Youneedtoimprovetheperformanceoftheform.Whatshouldyoudo？（）

A.Call the InitLayout method of the form before adding all the controls.Call the PerformLayout method of the form after adding all the controls.
B.Call the InitLayout method of the form before adding all the controls.Call the ResumeLayout method of the form after adding all the controls.
C.Call the SuspendLayout method of the form before adding all the controls.Call the PerformLayout method of the form after adding all the controls.
D.Call the SuspendLayout method of the form before adding all the controls.Call the ResumeLayout method of the form after adding all the controls.

单项选择题You are creating a Windows Forms application for a financial service provider by using the .NET Framework 3.5. You have to implement a multiple document interface （MDI） in the application to allow users to open multiple financial documents simultaneously.You need to ensure that whenever the child MDI form is created， the application displays a message in the title bar of the parent MDI that a child form has received focus.   What should you do？（）

A.Implement theActivated event
B.Implement the MdiChildActivate event
C.Override the OnParentVisibleChanged method
D.Override the OnParentBindingContextChanged method

多项选择题YouarecreatingaWindowsFormsapplicationbyusingthe.NETFramework3.5.TheapplicationdisplaysemployeenamesbyusingtheTreeViewcontrol.YouneedtoimplementthedraganddropfunctionalityintheTreeViewcontrol.Whichtwoactionsshouldyouperform？（）

A.Set theAllowDrag property to true.Create an event handler for the DragOver event.
B.Set theAllowDrag property to true.Create an event handler for the ItemDrag event to call the DoDragDrop method.
C.Set theAllowDrag property to true.Create an event handler for the DragEnter event to call the DoDragDrop method .
D.Create an event handler for the DragDrop event to handle the move or copy by itself.
E.Create an event handler for the DragEnter event to handle the move or copy by itself.

单项选择题You create Windows Forms applications by using the .NET Framework 3.5. You plan to deploy a new application by using the ClickOnce technology.During deployment， the application performs the following tasks： （1）Modifies registry keys   （2）Modifies the files located in the %PROGRAM FILES% folder  （3）Administrative permissions are not granted to users who install the application    You need to ensure that the following requirements are met：  （1）The application can be deployed to Windows Vista client computers that are not part of an Active Directory domain  （2）When the application is deployed， users are not prompted to elevate their permissions    What should you do？（）

A.Create a manifest and set the RequestedExecutionLevel level attribute to AsInvoker.
B.Create a manifest and set the RequestedExecutionLevel level attribute to As Administrator.
C.Create a new certificate trust list （CTL）.Use the CertMgr.exe tool to install the CTL on the local computer.
D.Create a new certificate trust list （CTL）.Install the CTL on the server that has theClickOnce application published.