返回eco列表集的几种方法

IObjectList customers = vfs.CreateTypedObjectList(typeof(Customer));
foreach (Customer currentCustomer in someOtherList)
  customers.Add(currentCustomer);

//If a customer has a single contract
IObjectList result = OclPs.Execute(customers, "self.contract");

//If a customer has many contracts
IObjectList result = OclPs.Execute(customers, "self.contracts");

//If the association is one way from contract to customer
IObjectList result = OclPs.Execute(customers,
"Contract.allInstances->select(currentContract |
currentContract.customer->includes(self))");

Might not compile though :-)