Regarding the ‘Common.Base.Instance.IsApplicationRunning’ it is a boolean that (as you said) indicates the activity of the application. If it is running it is true and during ‘application closure’ it turns to false.
I would suggest to use a bool variable which at the startup of the application is true and during the termination turns to false. Depending of which (WPF/WinForm/Console) you are using.
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不要用代码里面的（代码里的只是伪代码），他建议使用一个变量，如果程序启动就用true，程序关闭使用false