Combo box items drop dowm

[SRKSHOME]

Hi, I have 2 buttons in a window and a combo box which contains 3 items in it. When TAB is pressed and is on Combo box, its items are not expanding or dropping down. It just focus on the combo box and we have to use down arrow to select items. But what I want is when TAB is pressed and is focussed on Combo, its items should drop down.Which property I should use? many thanks.

[Deepak VS]

You can handle the GotFocus Event as shown below

private void ComboBox_GotFocus(object sender, RoutedEventArgs e)
{
(sender as ComboBox).IsDropDownOpen = true
}