Manage Sends to Publication Lists using Email Send Definitions

1public CreateResult[] CreateESD()
2{
3    EmailSendDefinition esd = new EmailSendDefinition();
4    esd.Email = new Email();
5    esd.Email.ID = 12345; //The ID of the email I wish to send
6    esd.Email.IDSpecified = true;
7    esd.CustomerKey = "Example 2"; //Setting the customer/external key of this email send definition
8    esd.Name = "Example 2"; //Setting the name of this email send definition
9    esd.SendClassification = new SendClassification();
10    esd.SendClassification.CustomerKey = "12345"; //This is the customer/external key of my default commercial send classification
11    esd.SendDefinitionList = new SendDefinitionList[1];
12    esd.SendDefinitionList[0] = new SendDefinitionList();
13    esd.SendDefinitionList[0].DataSourceTypeID = DataSourceTypeEnum.CustomObject; //Identifies data extension (CustomObject) as the target
14    esd.SendDefinitionList[0].DataSourceTypeIDSpecified = true;
15    esd.SendDefinitionList[0].CustomObjectID = RetrieveDXNID("12345"); //Pass the customer/external key of the data extension
16    esd.SendDefinitionList[0].List = new List();
17    esd.SendDefinitionList[0].List.ID = 12345; //The ID of the publication list to use with this data extension and email send definition
18    esd.SendDefinitionList[0].List.IDSpecified = true;
19    string status;
20    string requestID;
21    CreateResult[] results = client.Create(new CreateOptions(), new APIObject[] { esd }, out requestID, out status);
22    return results;
23}