实体类与字符串转换

using Newtonsoft.Json; 

public class ReturnPermissionJson
    {
        public Guid PointId { get; set; }
        public int TimsegId { get; set; }
    }

//字符串转换为类

var data = JsonConvert.DeserializeObject<ReturnPermissionJson>("(String字符串)");

//类转换为字符串
var data1=JsonConvert.SerializeObject(data);