AvalonDock.TestApp.MainWindow.OnToolWindow1Hiding C# (CSharp) Method

        private void OnToolWindow1Hiding(object sender, System.ComponentModel.CancelEventArgs e)
        {
            if (MessageBox.Show("Are you sure you want to hide this tool?", "AvalonDock", MessageBoxButton.YesNo)== MessageBoxResult.No)
                e.Cancel = true;
        }