我在VS中为我的Kentico Web应用程序添加了一个wcf服务（SifService）引用。我没有选择任何高级选项。我刚刚提供了wsdl地址，提供了一个命名空间（SifService）并单击OK。服务引用似乎已成功添加。但是，当我尝试在下面的代码中创建客户端的实例时，VS说无法找到类型或命名空间“SifService”。我们刚刚从Kentico 8升级到Kentico 9.相同的代码在Kentico 8代码分支中运行良好。该问题仅出现在Kentico 9分支中。
var sifClient = new SifService.SifClient();
当我尝试在VS中运行该站点时，我在浏览器中收到此错误：
Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: Reference.svcmap: Could not load file or assembly 'System.Web.Http, Version=5.2.2.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Source Error:
[No relevant source lines]
Source File: /App_WebReferences/SifService/ Line: 1
Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Web.Http, Version=5.2.2.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded.
注意：在将服务引用添加到SifService之前，一切正常。
答案 0 :(得分：0)
有时它是视觉工作室的错误，清理解决方案，构建，关闭视觉工作室并再次构建，对我来说它工作了几次！