项目从Visual Studio 2013 升级到 2015 后出现错误解决方案

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项目从Visual Studio 2013 升级到 2015 后出现错误解决方案

升级到VS2015后，Clear, 从新编译后，出现错误

Description: An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated.

解决方案：

1. 修改 Web.config
<customErrors mode="Off" >

编译运行，出现错误
Error: Attempt by security transparent method 'WebMatrix.WebData.PreApplicationStartCode.Start()' to access security critical method 'System.Web.WebPages.Razor.WebPageRazorHost.AddGlobalImport(System.String)' failed.

2. 安装程序包

View -> Others windows -> Package Manager Console 或者 Tools > NuGet Package Manager > Package Manager Console

PM> Install-Package Microsoft.AspNet.WebHelpers

再编译，出现新错误
Error：Could not load file or assembly 'WebMatrix.Data, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference

3. 再安装程序包
Tools > NuGet Package Manager > Package Manager Console

PM> Install-Package Microsoft.AspNet.WebPages.Data

再编译，运行正常，

4. 修改Web.config <customErrors mode="On" >

总结：

当项目升级到VS 2015. 若出现WebMatrix的错误，需要安装以下两个程序包：

Microsoft.AspNet.WebHelpers
Microsoft.AspNet.WebPages.Data

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