异常消息本身似乎是一个已知问题，如以下SO问题所提出:

The exception message itself appears to be a known problem as raised in this SO question:

转到JSON.NET 4.0.3的操作中断了我的应用

在使用Nuget安装具有所有必要依赖项的最新软件包之后(我以前是从CodePlex项目中手动下载.DLL的)，该代码无需进行其他更改即可工作.

After using Nuget to install the latest package with all necessary dependencies (I manually downloaded the .DLL's from the CodePlex project previously) the code worked with no additional changes.

感谢提供解决方案的用户.

Thank you to the users who provided solutions.