predefined System.Object类型没有定义或导入

本文介绍了predefined System.Object类型没有定义或导入的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我只在VS 2015 .cshtml文件有这个奇怪的错误。该错误不出来，当我打开与VS 2013项目。

I'm having this weird error only in .cshtml files in VS 2015. The error doesn't show up when I open the project with VS 2013.

错误CS0246类型或命名空间名称'系统'找不到  （是否缺少using指令或程序集引用？）

Error CS0246 The type or namespace name 'System' could not be found (are you missing a using directive or an assembly reference?)

下面是我的引用：

<ItemGroup> <Reference Include="Microsoft.CSharp" /> <Reference Include="Sitecore.Kernel, Version=7.0.0.0, Culture=neutral, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>N:\XXX\Sitecore.Kernel.dll</HintPath> </Reference> <Reference Include="Sitecore.Mvc"> <HintPath>N:\XXX\Sitecore.Mvc.dll</HintPath> </Reference> <Reference Include="System.Web.DynamicData" /> <Reference Include="System.Web.Entity" /> <Reference Include="System.Web.ApplicationServices" /> <Reference Include="System.ComponentModel.DataAnnotations" /> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Core" /> <Reference Include="System.Data.DataSetExtensions" /> <Reference Include="System.Web.Extensions" /> <Reference Include="System.Web.Helpers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>N:\XXX\System.Web.Helpers.dll</HintPath> </Reference> <Reference Include="System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>N:\XXX\System.Web.Mvc.dll</HintPath> </Reference> <Reference Include="System.Web.Providers"> <HintPath>N:\XXX\System.Web.Providers.dll</HintPath> </Reference> <Reference Include="System.Web.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>N:\XXX\System.Web.Razor.dll</HintPath> </Reference> <Reference Include="System.Web.WebPages, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>N:\XXX\System.Web.WebPages.dll</HintPath> </Reference> <Reference Include="System.Web.WebPages.Deployment, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>N:\XXX\System.Web.WebPages.Deployment.dll</HintPath> </Reference> <Reference Include="System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>N:\XXX\System.Web.WebPages.Razor.dll</HintPath> </Reference> <Reference Include="System.Xml.Linq" /> <Reference Include="System.Drawing" /> <Reference Include="System.Web" /> <Reference Include="System.Xml" /> <Reference Include="System.Configuration" /> <Reference Include="System.Web.Services" /> <Reference Include="System.EnterpriseServices" />

什么可能是这个原因？

请参考这个问题，我创建。这是同样的问题：The类型或命名空间名称'系统'找不到

Please refer to this question that I created as well. It's the same issue: The type or namespace name 'System' could not be found

推荐答案

我有很多的VS 2015年4 MVC智能感知CSHTML问题，选择刚刚升级到MVC 5.然而，MVC 4应该仍然工作，只是没有完美，根据：Does的Visual Studio 2015年支持旧版本的MVC？。

I had a lot of CSHTML Intellisense issues with MVC 4 in VS 2015 and opted just to upgrade to MVC 5. However, MVC 4 should still work, just not perfectly, according to: Does Visual Studio 2015 support older versions of MVC?.