String formatting c# decode?

I have a string which looks like this '%7B%22id%22%3A开发者_如何学Python1%2C%22name%22%3A%22jim%22%7D' When read from a cookie it is in fact a JSON object and should look like {"id":1,"name":"jim"}

Do I need to HTML decode the string to make it appear in the correct JSON notation?

Thanks,

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Look at HttpUtility.UrlDecode in System.Web

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Also assuming your using .Net 3.5 check this article by ScottGu and follow up from Scott Longnecker that allows you to convert c# classes to json and viceversa.

http://tiredblogger.wordpress.com/2007/10/03/to-and-fromjson-extension-methods/