错误'并非所有代码路径都返回值' [英] Error 'not all code paths return a value'

问题描述

在'ToXml'中获取此代码中的错误：

Getting errors in this code on 'ToXml':

public class EventCode
   {
       public static string ToXml(Soap.EventCode.EvCodes value)
       {
           switch (value)
           {
               case Soap.EventCode.EvCodes.DispatchedForDelivery:
               case Soap.EventCode.EvCodes.Delivered:
                   return "OD";
               case Soap.EventCode.EvCodes.DepartedFromTerminal:
                   return "L1";
           }
       }
   }

推荐答案

public class EventCode
   {
       public static string ToXml(Soap.EventCode.EvCodes value)
       {
           switch (value)
           {
               case Soap.EventCode.EvCodes.DispatchedForDelivery:
               case Soap.EventCode.EvCodes.Delivered:
                   return "OD";
               case Soap.EventCode.EvCodes.DepartedFromTerminal:
                   return "L1";
           }
       }
   }

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