Find item in WPF ComboBox

DropDownList1.Items.FindByText

ComboBoxItem item =
    (ComboBoxItem)myComboBox.ItemContainerGenerator.ContainerFromItem(myObject);

<ComboBox Name="combo">
        <ComboBoxItem Name="item1" >1</ComboBoxItem>
        <ComboBoxItem Name="item2">2</ComboBoxItem>
        <ComboBoxItem Name="item3">3</ComboBoxItem>
    </ComboBox>

item1.Content = "New content"; // Reference combo box item by name
   ComboBoxItem item = (ComboBoxItem)this.combo.FindName("item1"); // Using FindName method

ComboBoxItem item = (ComboBoxItem) control.ItemContainerGenerator.ContainerFromItem(control.SelectedItem);

ComboBoxItem item = (ComboBoxItem) control.ItemContainerGenerator.ContainerFromIndex(1);

ComboBox box=new ComboBox();
int index=box.FindString("SomeString");