How to remove all ListBox items?

Question

I created two RadioButton (Weight and Height). I will do switch between the two categories. But the they share the same ListBox Controllers (listBox1 and listBox2).

Is there any good method to clear all the ListBox items simpler? I didn't find the removeAll() for ListBox. I don't like my complex multi-lines style which I posted here.

private void Weight_Click(object sender, RoutedEventArgs e)     {         // switch between the radioButton "Weith" and "Height"         // Clear all the items first         listBox1.Items.Remove("foot");          listBox1.Items.Remove("inch");         listBox1.Items.Remove("meter");         listBox2.Items.Remove("foot");         listBox2.Items.Remove("inch");         listBox2.Items.Remove("meter");          // Add source units items for listBox1         listBox1.Items.Add("kilogram");         listBox1.Items.Add("pound");          // Add target units items for listBox2         listBox2.Items.Add("kilogram");         listBox2.Items.Add("pound");     }      private void Height_Click(object sender, RoutedEventArgs e)     {         // switch between the radioButton "Weith" and "Height"         // Clear all the items first         listBox1.Items.Remove("kilogram");         listBox1.Items.Remove("pound");         listBox2.Items.Remove("kilogram");         listBox2.Items.Remove("pound");          // Add source units items for listBox1         listBox1.Items.Add("foot");         listBox1.Items.Add("inch");         listBox1.Items.Add("meter");          // Add target units items for listBox2         listBox2.Items.Add("foot");         listBox2.Items.Add("inch");         listBox2.Items.Add("meter");     } 

Answer 1

isn't the same as the Winform and Webform way?

listBox1.Items.Clear(); 

Answer 2

I think it would be better to actually bind your listBoxes to a datasource, since it looks like you are adding the same elements to each listbox. A simple example would be something like this:

    private List<String> _weight = new List<string>() { "kilogram", "pound" };     private List<String> _height = new List<string>() { "foot", "inch", "meter" };      public Window1()     {                     InitializeComponent();     }              private void Weight_Click(object sender, RoutedEventArgs e)     {         listBox1.ItemsSource = _weight;         listBox2.ItemsSource = _weight;     }      private void Height_Click(object sender, RoutedEventArgs e)     {         listBox1.ItemsSource = _height;         listBox2.ItemsSource = _height;     }