public void DeleteCustomer(string customerNumber)
{
if (customerNumber == null)
{
throw new ArgumentNullException(nameof(customerNumber));
}
if (String.IsNullOrWhiteSpace(customerNumber))
{
throw new ArgumentException(nameof(customerNumber));
}
if (!customerStore.CustomerExists(customerNumber))
{
throw new InvalidOperationException("The customer number does not exist.");
}
customerStore.Delete(customerNumber);
}
public void DeleteCustomer(string customerNumber)
{
if (customerNumber == null)
{
throw new ArgumentNullException(nameof(customerNumber));
}
if (String.IsNullOrWhiteSpace(customerNumber))
{
throw new ArgumentException(nameof(customerNumber));
}
if (!customerStore.CustomerExists(customerNumber))
{
throw new InvalidOperationException("The customer number does not exist.");
}
if (tenancyStore.GetCustomerUnits(customerNumber).Any())
{
throw new InvalidOperationException("The customer has one or more units reserved and cannot be deleted until all units are released");
}
customerStore.Delete(customerNumber);
}