[Test]
public void ExpectEventToBeFired(){
    var toTest = new MyBusinessLogic();
    var eventFiredExpected = "";
    toTest.OperationFinishedNotification
        += eventArgument =>
                    {
                        eventFiredExpected = eventArgument;
                    };
    var result = toTest.AwesomeBusinessOperation();
    Assert.AreEqual("Tons of money",eventFiredExpected);
}