Development Class C#

using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
public static class Base64Serializer
{
    public static string Serialize(object value)
    {
        MemoryStream ws = new MemoryStream();
        BinaryFormatter sf = new BinaryFormatter();
        sf.Serialize(ws, value);
        byte[] bytes = ws.GetBuffer();
        return bytes.Length + ":" + Convert.ToBase64String(bytes, 0, bytes.Length, Base64FormattingOptions.None);
    }
    public static object Deserialize(string base64)
    {
        int p = base64.IndexOf(':');
        int length = Convert.ToInt32(base64.Substring(0, p));
        byte[] data = Convert.FromBase64String(base64.Substring(p + 1));
        MemoryStream rs = new MemoryStream(data, 0, length);
        BinaryFormatter sf = new BinaryFormatter();
        return sf.Deserialize(rs);
    }
}