I see that sending an email through constant contact itself has emoji support but so far I haven't been able to get it to work with the API.  The code source that I'm using is: https://github.com/constantcontact/.net-sdk.  When trying to create the campaign I'm getting the following error message:   Exception: json.payload.contains_invalid_characters:The request contains text outside supported character set.   Has anyone gotten emoji's working? ... View more