public void And_IsConnectionString_is_true_then_setting_is_saved_as_connection_string() { var settings = new AppSettings("filename", FileOption.None); var mySettings = new SettingsWithConnectionString() { DatabaseConnectionString = @"Data Source=localhost;Initial Catalog=MyDb;User Id=username;Password=password;" }; settings.ReadFrom(mySettings); var value = settings.GetConnectionString("MyDb"); Assert.AreEqual(value, mySettings.DatabaseConnectionString); }