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Capturing the Enter Key in the WPF textbox control

Unlike the visual basic forms textbox control, the WPF textbox control does not have a keypress event. So how do we know when the user has pressed the Enter key while the textbox has focus?

Here's how its done on a standard windows form in vb.net

 
Private Sub TextBox1_KeyPress(ByVal sender As Object,
ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
        If (e.KeyChar = vbCr) Then
            CheckedListBox1.Items.Add(TextBox1.Text)
            TextBox1.Text = ""
            e.Handled = True
        End If
End Sub
 

And here's how we do it with a WPF textbox control.We use the PreviewKeyUp Event and the Key property of e the KeyEventArgs, comparing it to Key.Enter. 

 
 
Private Sub TextBox1_PreviewKeyUp(ByVal sender As Object, 
ByVal e As System.Windows.Input.KeyEventArgs) Handles TextBox1.PreviewKeyUp
        If (e.Key = Key.Enter) Then
            ListBox1.Items.Add(TextBox1.Text)
			TextBox1.Text = ""
			e.Handled = True
        End If
End Sub