单项选择题 You work as an application developer at Certkiller .com. You have been asked by you superiors at Certkiller .com to create a child application domain.  The new child application domain has to specify a different assembly path than that of the parent application domain.You need to ensure that your solution meets Certkiller .com’s requirements.What should you do？（）

单项选择题 You work as an application developer at Certkiller .com. You have recently created an application that includes the code shown below. public delegate stringGetFileContentsDel （）； public string GetFileContents （） {  //Process file and return results }  You now need to invoke the GetFileContents method asynchronously.  You have to ensure that the code you use to invoke the GetFileContents method will continue to process other user instructions， and displays the results as soon as the GetFileContents method finishes processing.What should you do？（）

单项选择题 You work as an application developer at Certkiller .com. You have created a Windows service application for the purpose of monitoring the number of active service requests running on Certkiller .com’s server.  You want to configure this Windows service application to produce a report every ten minutes. You start by placing the reporting logic in the GenerateReport method of this Windows service.You want to create a Timer object that invokes this method every ten minutes.What should you do？ （）