How can I tell that my program is under unit test environment

I have a console application. In release environment, it works perfectly at this time. When in IDE debug environment, I don't want the console window close, so I added this function, and calling it in the very end of my program.

[Conditional("DEBUG")]
public static void DebugWaitAKey(string message = "Press any key")
{
    Console.WriteLine(message);
    Console.ReadKey();
}

It works well for me, when I debug my program. But with unit testing, it still wait for a key before exiting!

The work-around is only unit-testing release edition of my program, or test other functions. But I do want something can identify current session is under unit testing, and use that flag in this function.