解决BUG:CS1617: 选项“6”对 /langversion 无效；必须是 ISO-1、ISO-2、3、4、5 或 Default

vs 2015的项目用vs2013，更改.net版本之后，打开会报以下错误，原因是配置文件修改出了问题。已经验证是BUG

你只需要把Web.config换成以前的就好了。

 

https://connect.microsoft.com/VisualStudio/feedback/details/1607466

 

编译错误

说明: 在编译向该请求提供服务所需资源的过程中出现错误。请检查下列特定错误详细信息并适当地修改源代码。 

编译器错误消息: CS1617: 选项“6”对 /langversion 无效；必须是 ISO-1、ISO-2、3、4、5 或 Default

源错误:

[没有相关的源行]

源文件:    行: 0 

显示详细的编译器输出:

C:Program Files (x86)IIS Express> "C:WindowsMicrosoft.NETFrameworkv4.0.30319csc.exe" /t:library /utf8output /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Xml.Linqv4.0_4.0.0.0__b77a5c561934e089System.Xml.Linq.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3544a9d522461f901_fe19d201System.Web.WebPages.Razor.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3529a27e0b00a80c_fe19d201Microsoft.AI.WindowsServer.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_32System.Datav4.0_4.0.0.0__b77a5c561934e089System.Data.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Data.DataSetExtensionsv4.0_4.0.0.0__b77a5c561934e089System.Data.DataSetExtensions.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.WorkflowServicesv4.0_4.0.0.0__31bf3856ad364e35System.WorkflowServices.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Xmlv4.0_4.0.0.0__b77a5c561934e089System.Xml.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl328bdb842f01b1afa_fd19d201Moq.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3d39f5c1e927e662b_fe19d201EntityFramework.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Web.WebPages.Deploymentv4.0_2.0.0.0__31bf3856ad364e35System.Web.WebPages.Deployment.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3db05be7e4b6c495_fd19d201Ninject.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3cdaa9c9a089ca12_fe19d201Microsoft.ApplicationInsights.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.ServiceModel.Activitiesv4.0_4.0.0.0__31bf3856ad364e35System.ServiceModel.Activities.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3484eb26563b6414_fe19d201Microsoft.AI.Agent.Intercept.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILMicrosoft.Web.Infrastructurev4.0_1.0.0.0__31bf3856ad364e35Microsoft.Web.Infrastructure.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl32d1cb1279163c10b_fe19d201Microsoft.AI.ServerTelemetryChannel.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.ServiceModelv4.0_4.0.0.0__b77a5c561934e089System.ServiceModel.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Web.Extensionsv4.0_4.0.0.0__31bf3856ad364e35System.Web.Extensions.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3a7fb7faed645c502_fe19d201System.Web.WebPages.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILMicrosoft.CSharpv4.0_4.0.0.0__b03f5f7f11d50a3aMicrosoft.CSharp.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.ServiceModel.Activationv4.0_4.0.0.0__31bf3856ad364e35System.ServiceModel.Activation.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.ServiceModel.Webv4.0_4.0.0.0__31bf3856ad364e35System.ServiceModel.Web.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILMicrosoft.VisualStudio.Web.PageInspector.Loaderv4.0_1.0.0.0__b03f5f7f11d50a3aMicrosoft.VisualStudio.Web.PageInspector.Loader.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl371e15e0013e5d1a_fe19d201EntityFramework.SqlServer.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Activitiesv4.0_4.0.0.0__31bf3856ad364e35System.Activities.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_32System.EnterpriseServicesv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.EnterpriseServices.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.IdentityModelv4.0_4.0.0.0__b77a5c561934e089System.IdentityModel.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl311ca467a0584710_fe19d201Microsoft.AI.DependencyCollector.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Web.DynamicDatav4.0_4.0.0.0__31bf3856ad364e35System.Web.DynamicData.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3dabad01c5d703b03_fe19d201System.Web.Helpers.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Corev4.0_4.0.0.0__b77a5c561934e089System.Core.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3094390f614f3503_fe19d201System.Web.WebPages.Deployment.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Runtime.Serializationv4.0_4.0.0.0__b77a5c561934e089System.Runtime.Serialization.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl310454fb857a6f007_fe19d201System.Web.Razor.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3701dd0145d70040a_fe19d201System.Web.Mvc.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Web.Servicesv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.Web.Services.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Configurationv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.Configuration.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl31df88e37e7234701_fe19d201Microsoft.CodeDom.Providers.DotNetCompilerPlatform.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.ComponentModel.DataAnnotationsv4.0_4.0.0.0__31bf3856ad364e35System.ComponentModel.DataAnnotations.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Drawingv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.Drawing.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319mscorlib.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl322b02f8d844be681_ff19d201SportsStore.WebUI.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystemv4.0_4.0.0.0__b77a5c561934e089System.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3d4100698e847c10c_fe19d201Microsoft.AI.Web.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Web.ApplicationServicesv4.0_4.0.0.0__31bf3856ad364e35System.Web.ApplicationServices.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl3d25b5cd56eb0c80_ff19d201SportsStore.Domain.dll" /R:"C:WindowsMicrosoft.NetassemblyGAC_32System.Webv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.Web.dll" /R:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144assemblydl311b8ae51fc53c10_fe19d201Microsoft.AI.PerfCounterCollector.dll" /out:"C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144App_global.asax.7axkitzh.dll" /D:DEBUG /debug+ /optimize- /warnaserror /w:4 /nowarn:1659;1699;1701;612;618 /langversion:6 /nowarn:1659;1699;1701  "C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144App_global.asax.7axkitzh.0.cs" "C:WindowsMicrosoft.NETFrameworkv4.0.30319Temporary ASP.NET Files
ootcdd232024339e144App_global.asax.7axkitzh.1.cs"


Microsoft (R) Visual C# Compiler version 4.6.1586.0

for C# 5
Copyright (C) Microsoft Corporation. All rights reserved.



This compiler is provided as part of the Microsoft (R) .NET Framework, but only supports language versions up to C# 5, which is no longer the latest version. For compilers that support newer versions of the C# programming language, see http://go.microsoft.com/fwlink/?LinkID=533240

error CS1617: 选项“6”对 /langversion 无效；必须是 ISO-1、ISO-2、3、4、5 或 Default