AppendFormat System.FormatException: 输入字符串的格式不正确

 sbTemp.AppendFormat(" public Model_{0} GetModel(Model_{1} model)\r\n}", tableName, tableName);
将字符串最后的 }去掉
改为：即可
 sbTemp.AppendFormat(" public Model_{0} GetModel(Model_{1} model)\r\n", tableName, tableName);