private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e) { var userPrefs = new UserPreferences { WindowHeight = this.ActualHeight, WindowWidth = this.ActualWidth, WindowTop = this.Top, WindowLeft = this.Left, WindowState = this.WindowState, WindowLeftColumn = Convert.ToDouble(this.Explorer.columnLeft.Width.ToString()), WindowRightColumn = Convert.ToDouble(this.Explorer.columnRight.Width.ToString()) }; userPrefs.Save(); }