Getting sent message body texts using the Esendex .Net SDK - Full details here: http://developers.esendex.com/

GetSentMessageBodies.cs

using com.esendex.sdk.messaging;
using com.esendex.sdk.sent;

...

const int pageNumber = 1;
const int pageSize = 20;

var credentials = new EsendexCredentials(USERNAME, PASSWORD);
var sentService = new SentService(credentials);
var messageBodyService = new MessageBodyService(credentials);
try
{
    var sentMessages = sentService.GetMessages(pageNumber, pageSize);

    foreach (var message in sentMessages.Messages)
    {
        messageBodyService.LoadBodyText(message.Body);
        Console.WriteLine("Message Id:{0}\nMessage:{1}\n\n", message.Id, message.Body.BodyText);
    }
}
catch (WebException ex)
{
    Console.Write(ex.Message);
}