You are designing an application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010. You plan to design an instrumentation strategy for the application. You need to ensure that the strategy meets the following requirements: Captures detailed performance information. Enables or disables diagnostic messages by using an application configuration option without requiring the application to restart. What should you design?

A.
a custom trace listener

B.
a custom performance counter

C.
an override to the Debug class

D.
an override to the EventLog class