Creating a contact record

Hi,

We are trying to create a C# app to create a new lead, and the corresponding contact record.  We have the customer record being created successfully, but are running into some "typing" issues with the contact record relative to their documentation (we were referencing their online documentation for a while, then found the PDF, and realized the HTML docs were a bit out of date). 

Anyway, we are creating a contact record like this:

                   // create a contact record
                    Contact contact = new Contact();
                    contact.comments = "comments";
                    contact.email = "jasen@hotmail.com";
                    contact.firstName = "test";
                    contact.lastName = "contact";
                    contact.phone = "4 44 444444";
                    contact.unsubscribe = false;