定义返回类ReturnMsg：

public class ReturnMsg
{/// <summary>/// 成功构造函数/// </summary>/// <param name="ReBody">实体类或者实体类集合都可以</param>public ReturnMsg(object ReBody){Status = ReStatus.Success.ToString();Body = ReBody;}/// <summary>/// 失败构造函数/// </summary>/// <param name="ex"></param>public ReturnMsg(Exception ex){Error = ex.Message;Status = ReStatus.Fail.ToString();}public string Error { get; set; }public string Status { get; set; }public object Body { get; set; }}
enum ReStatus
{Fail = 0,Success = 1
}

调用，返回类型为ReturnMsg，成功则New ReturnMsg(object)，失败则New ReturnMsg(Exception)

        [HttpPost]public ReturnMsg Post(coreUser coreuser){try{using (TransactionScope trans = new TransactionScope()){trans.Complete();return new ReturnMsg(coreuser);}}catch (Exception ex){return new ReturnMsg(ex);}}