error when remove item from combobox

Question

hi all,
I have a piece of code, I can delete the first value but fails and give notice
InvalidArgument=Value of '0' is not valid for 'index'.
Parameter name: index

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Private Sub ComboBox1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles ComboBox1.KeyDown 

     If ComboBox1.Items.Count > 0 Then  

        If e.KeyCode = Keys.Delete Then 

             ComboBox1.Items.Remove(ComboBox1.SelectedItem) 

             'or            

              'ComboBox1.Items.RemoveAt(ComboBox1.SelectedIndex)   

       End If     

    End If  

End Sub

thank help !