c# - Parse Json Data in wcf Rest? -

i want create wcf rest service accept json data , parse value.

my json data coming client side this:

{"user":{"username":"123","pass":"123"}} 

i create simple wcf operationcontract :

 [operationcontract]         [webinvoke(method = "post",             uritemplate = "login",             bodystyle = webmessagebodystyle.wrapped,             responseformat = webmessageformat.json,             requestformat = webmessageformat.json           )]         string login(user user); 

what can in login method parsing json data??

if send data client this:

{"username":"123","pass":"123"} 

you have class

class user{  public string username {get;set;} public string pass {get;set;} } 

if client insist on request :

{"user":{"username":"123","pass":"123"}}, 

you should have class:

class user{  public string username {get;set;} public string pass {get;set;} } 

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class requestj{ public user user{get;set;} } 

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and must change wcf service :

[operationcontract]         [webinvoke(method = "post",             uritemplate = "login",             bodystyle = webmessagebodystyle.wrapped,             responseformat = webmessageformat.json,             requestformat = webmessageformat.json           )]         string login(requestj user);