Problem using Add key value in app.config of c# windows application

I am trying to use the below in my app.config

<add key="InstanceID" value="HID\VID_413C&PID_3200\6&227E6开发者_运维百科ED3&0&0000" />

It shows error in app.config, what is the problem ? i want to use this value as string in my c# code.

You need to encode your special characters, example (& = &). I think that's the only problem character.