Get parent fields when using Retrieve or RetrieveMultiple

Hi

Using Late Bounding to Retrieve a record in C#, I want to see if it is possible to get parent fields of that record in single request. For example, consider a quote record which has parents like 'Customer' or 'Opportunity', How can I Use service.Retrieve  to get Customer`s (Say it is Contact) custom field value ?

var quote = service.Retrieve("quote", quiteId, new ColumnSet(true));

// Get a custom field of Quote Customer Record, Say her website address.