單項(xiàng)選擇題

面關(guān)于新增配置文件節(jié)點(diǎn)代碼中應(yīng)該填入的是()Configurationcf=ConfigurationManager.OpenExeConfiguration(“配置文件");cf.AppSettings.Settings.Add(“color”,“red”);//新增appSettings節(jié)點(diǎn)____________________;

A.ConfigurationManager.RefreshSection(“appSettings”)
B.cf.Save()
C.returncf
D.cf.AppSettings.Settings["color"].Value=status

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