if (someVar)
    {
        comboBoxAlpha.DataBindings.Add(new Binding("SelectedValue", this.bindingSource, "DecoratedStringEnum1", true));
        comboBoxAlpha.DataSource = new BindingSource(Utility.ToList(typeof(Person.DecoratedStringEnum1)), null);
        comboBoxAlpha.DisplayMember = "Value";
        comboBoxAlpha.ValueMember = "Key";
    }
    else
    {
        comboBoxAlpha.DataBindings.Add(new Binding("SelectedValue", this.bindingSource, "DecoratedStringEnum2", true));
        comboBoxAlpha.DataSource = new BindingSource(Utility.ToList(typeof(Person.DecoratedStringEnum2)), null);
        comboBoxAlpha.DisplayMember = "Value";
        comboBoxAlpha.ValueMember = "Key";
    }