deserialize json to c# string

I apologize if I'm asking the same question again, but I have a simple JSON string that I need to deserialize. But I can use .NET 3.5 only. Here's my string:

{
  "DataCon": {
    "ActivityID": "ACT001",
    "RequestID": 123,
    "CRMID": 998989,
    "LeadID": "LEAD001",
    "ProcessName": "PROC",
    "ContatcID": "CON001"
  },
  "Errors": [

  ],
  "Warnings": [

  ]
}

Please help me find a solution using .NET 3.5 only

via Chebli Mohamed