public static Result<string> Send(string apiKey, string campaignID, string confirmationEmailAddress, DateTime sendDate)
        {
            CampaignMonitorAPIWrapper.CampaignMonitorAPI.api _api = new CampaignMonitorAPI.api();

            object o = _api.SendCampaign(apiKey, campaignID, confirmationEmailAddress, sendDate.ToString("yyyy-MM-dd HH:mm:ss"));

            if (o is CampaignMonitorAPI.Result)
                return new Result<string>((CampaignMonitorAPI.Result)o, "");
            else
                return new Result<string>(0, "Success", Convert.ToString(o));
        }