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。

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