Convert Object to JSON

object.js

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using UNCWebcomm;

using System.Runtime.Serialization; //Add Reference to

namespace NewsClasses {
  
    [DataContract]
    public class Keyword {

        [DataMember]
        public int Id { get; set; }

        [DataMember]
        public string Title { get; set; } 

        [DataMember]
        public string Slug { get; set; }

        [DataMember]
        public bool Active { get; set; }
        
    }

  
}

page.aspx.cs

Keyword LoadKeyword = new Keyword();

MemoryStream stream1 = new MemoryStream();
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(Keyword));

ser.WriteObject(stream1, LoadKeyword);

stream1.Position = 0;
StreamReader sr = new StreamReader(stream1);

string Json = (sr.ReadToEnd();