Read the data like this
var theTextContentOfMyFile = { "ErrorCode": 0, "JsonResult": [{ "Id": 1, "Name": "Ajay", "Street": "Vikashmarg", "City": "Delhi", "State": "Delhi", "Contact": "9875434", "Email": "aaa@gmail.com", "Image": null, "Desiganation": "Docter"}] };
var firstItem = theTextContentOfMyFile.JsonResult[0];
firstItem.City
firstItem.Contact
firstItem.Email
firstItem.Id
firstItem.Image