error in consuming json object

hi,

i have to parse the body part , 

{"Body":{"AuthResponse":{"skin":[{"_content":"beach"}],"sessionId":{"_content":"162","id":"162"},"lifetime":172800000,"authToken":"0_fcf6732b7e4fcbb7bef9e4beab1c9164c9535aa7_69643d33363a65343438663963382d343639332d343864322d623531652d6137346438353836663863663b6578703d31333a313231333836313430363030373b747970653d363a7a696d6272613b6d61696c686f73743d31343a3139322e3136382e312e373a38303b","attrs":{"_attrs":{"displayName":"hari prasad"}},"_jsns":"urn:zimbraAccount"}}

i need display name attribute,

have a class defined for it as

public class Attrs
    {
         public string a{get;set;}
         public string dis ...