public Customer InsertCustomer(Customer cust)
{
if (!_Customers.Any(c => c.ID == cust.ID))
{
_Customers.Add(cust);
return cust;
}
return null;
}
public bool UpdateCustomer(Customer cust)
{
var targetCust = _Customers.Where(c => c.ID == cust.ID).SingleOrDefault();
if (targetCust != null)
{
_Customers.Remove(targetCust);
_Customers.Add(cust);
return true;
}
return false;
}