C#

[Serializable]
public class SerialObj
{
    public System.Drawing.Color color;
}

SoapFormatter formatter = new SoapFormatter();     // Serialize:
formatter.AssemblyFormat = System.Runtime.Serialization.Formatters.FormatterAssemblyStyle.Simple;
formatter.Serialize(myStream, so);

SoapFormatter formatter = new SoapFormatter();     // Deserialize:
formatter.AssemblyFormat = System.Runtime.Serialization.Formatters.FormatterAssemblyStyle.Simple;
so = (SerialObj)formatter.Deserialize(myStream);

[Serializable]
public class SerialObj : ISerializable
{
    public System.Drawing.Color color;
    public int number;                   // The new member.

    public SerialObj()
    {
        System.Windows.Forms.MessageBox.Show("In empty ctor.");
    }


    public SerialObj(SerializationInfo info, StreamingContext cntxt)
    {
        System.Windows.Forms.MessageBox.Show("In full ctor.");
        color = (System.Drawing.Color)info.GetValue("color", typeof(System.Drawing.Color));

        try
        {
            number = info.GetInt32("number");
        }
        catch (Exception ex)
        {
            System.Windows.Forms.MessageBox.Show(ex.Message);
        }
    }


    void ISerializable.GetObjectData(SerializationInfo inf, StreamingContext cxt)
    {
        System.Windows.Forms.MessageBox.Show("In GetObjectData.");
        inf.AddValue("color", color);
        inf.AddValue("number", number);
    }
}