public static Result<List<string>> GetCountries(string apiKey)
        {
            CampaignMonitorAPIWrapper.CampaignMonitorAPI.api _api = new CampaignMonitorAPI.api();

            object o = _api.GetCountries(apiKey);

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