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  1. PO
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    <p>That code works perfectly for me (I simply added the missing <code>Student</code> class. Is that code actually representative of your <em>real</em> code. In particular, buffer handling (maybe file IO) would be my first suspicion. But the bug isn't in the code you posted... it works fine.</p> <p>As an aside... <code>BinaryFormatter</code> can be brittle, especially around different versions - you may want to consider alternative serializers. Ask for more info if you are interested.</p> <p>Here it is runnable:</p> <pre><code>using System.IO; using System.Runtime.Serialization.Formatters.Binary; using System; static class Crypto { static byte[] Serialize(object o) { MemoryStream ms = new MemoryStream(); BinaryFormatter bf1 = new BinaryFormatter(); bf1.Serialize(ms, o); byte[] buffer = ms.ToArray(); //string retStr = Convert.ToBase64String(buffer); return buffer; } public static object Deserialize(byte[] TheByteArray) { //byte[] TheByteArray = Convert.FromBase64String(ParamStr); MemoryStream ms = new MemoryStream(TheByteArray); BinaryFormatter bf1 = new BinaryFormatter(); ms.Position = 0; return bf1.Deserialize(ms); } [Serializable] class Student { public string UserName { get; set; } public string Password { get; set; } public int[] LessonIds { get; set; } public string[] LessonNames { get; set; } public int Id { get; set; } } static void Main() { Student obj = new Student(); obj.UserName = "Admin"; obj.Password = "Password"; obj.LessonIds = new int[] { 1, 2, 3, 4, 5 }; obj.LessonNames = new string[] { "Spanish", "Maths" }; obj.Id = 43; byte[] retByteArray = Crypto.Serialize(obj); Student objNew = (Student)Crypto.Deserialize(retByteArray); } } </code></pre>
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    1. POProblem with serialization
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    1. PTAnswer
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    1. USMarc Gravell
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    1. COFor info, I jut ran it through protobuf-net for comparison: BinaryFormatter=363 bytes; protobuf-net=45 bytes...
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      1. USMarc Gravell
    2. COThank you everybody. I found my mistake. My student class implements ISerializable interface; when I remove it, it works. But I did not understand problem with interface.
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      1. USuser125687
 

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