WPF Combobox item selected by default

Question

Hi,

I have combobox with three <comboBoxItem>.

<ComboBox>
       <ComboBoxItem>Item1</ComboBoxItem>
       <ComboBoxItem>Item2</ComboBoxItem>
       <ComboBoxItem>Item3</ComboBoxItem>
</ComboBox>

I want by default second item selected when it is load.

Without code behind like, selected item index ...