public void LiveActivityAddContactsMultipartTest()
{
var cc = new ConstantContact(ApiKey, AccessToken);
var filename = "add_contacts.txt";
var content = Encoding.UTF8.GetBytes(String.Format("{0}@example.com", Guid.NewGuid()));
var lists = new List<string>() { "1" };
Activity activity = cc.AddContactsMultipartActivity(filename, content, lists);
Assert.IsNotNull(activity);
Assert.IsNotNull(activity.Id);
Assert.AreEqual(activity.ContactCount, 1);
Assert.AreEqual(activity.Type, "ADD_CONTACTS");
}