public HaircutForm()
{
InitializeComponent();
Haircut = new Haircut();
FillClientComboBox();
editBtn.Enabled = false;
}
public HaircutForm(Haircut haircut)
{
InitializeComponent();
Haircut = haircut;
FillClientComboBox();
FillFormWithExistingProps();
addBtn.Enabled = false;
}