[
  {
    "Id": 5,
    "AlbumKey": "2REC2ZDSFK",
    "ZipFillPath": "aaaa@gmail.com\2REC2ZDSFK",
    "NoOfPages": 3,
    "EmailID": "aaaa@gmail.com"
  }
]

public class RootObject
{
    public int Id { get; set; }
    public string AlbumKey { get; set; }
    public string ZipFillPath { get; set; }
    public int NoOfPages { get; set; }
    public string EmailID { get; set; }
}

RootObject myObj = JsonConvert.DeserializeObject<RootObject>(json);

List<RootObject> myListObj = JsonConvert.DeserializeObject<List<RootObject>>(json);