Server Error in '/' Application.
Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive.
Source Error:
Line 3:
Line 4: <system.web>
Line 5: <compilation debug="false" targetFramework="4.0" />
Line 6: </system.web>
Line 7: <system.serviceModel>
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Source File: C:\inetpub\wwwroot\EvalserviceSite\web.config Line: 5
Version Information: Microsoft .NET Framework Version:2.0.50727.5448; ASP.NET Version:2.0.50727.5456
发生上面问题的主要原因是当前vs工程使用的时.NET4.0的版本，而IIS上默认的该website的.Net Framework Version 是低于4.0的版本
打开 IIS: 自己电脑名字 -> Application Pools ->website名字->右键单击->选择“Basic setting...” -> “.Net Framework version”(选择 .Net Framework v4.0)->确定。
如果不起作用关掉IIS，重新打开一下
Open IIS: "My computer name" -> Application Pools -> your website name(.Net Framework Version)->right click->Basic setting... -> .Net Framework version(select .Net Framework v4.0)->OK
如果想一劳永逸那就直接选择“Set Application Pool Default...”，在里面的 ”.Net Framework version“选择"v4.0"，关闭IIS重新打开全部会设置为4.0版本的.NET Framework version。