public static Result<string> CreateCustomField(string apiKey, string listID, string fieldName, CampaignMonitorAPIWrapper.CampaignMonitorAPI.SubscriberFieldDataType dataType, string options) { CampaignMonitorAPIWrapper.CampaignMonitorAPI.api _api = new CampaignMonitorAPI.api(); object o = _api.CreateListCustomField(apiKey, listID, fieldName, dataType, options); if (o is CampaignMonitorAPI.Result) return new Result<string>((CampaignMonitorAPI.Result)o, ""); else return new Result<string>(0, "Success", Convert.ToString(o)); }