You work as an application developer at Certkiller .com. You have recently created an application domain for Certkiller .com. A few weeks later， you are required to determine if assembly references in this application domain， which is the current application domain， are being cached. What property should you use to achieve this objective？（） A:  AppDomain.CurrentDomain.ShadowCopyFiles B:  AppDomain.CurrentDomain.CachePath C:  AppDomain.CurrentDomain.ConfigurationFile D:  AppDomain.CurrentDomain.Evidence