记录一个错误，报 The type 'System.Object' is defined in an assembly that is not referenced，[System.Runtime]
配置文件加上后仍报错！
<system.web>
<compilation debug="true" targetFramework="4.5">
<assemblies>
<add assembly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
</assemblies>
</compilation>
</system.web>
解决方法：移除Bin System.ValueTyple.dll rebuild成功。