Custom exception pattern

gistfile1.cs

[Serializable]
public class CustomException : Exception
{
    public CustomException() { }
    public CustomException(string message) : base(message) { }
    public CustomException(string message, System.Exception innerException) : base(message, innerException) { }

    public override void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        //...
        base.GetObjectData(info, context);
    }

    protected CustomException(SerializationInfo info, StreamingContext context)
        : base(info, context)
    {
    }
}

[Serializable]
public class CustomException : Exception
{
    private const string DefaultMessage = "Custom exception message.";
    private const string DefaultMessageWithId = "Custom exception message [{0}].";

    public CustomException() : this(DefaultMessage) { }
    public CustomException(int id) : this(string.Format(CultureInfo.InvariantCulture, DefaultMessageWithId, id)) { }
    public CustomException(string message) : base(message ?? DefaultMessage) { }
    public CustomException(string message, Exception innerException) : base(message ?? DefaultMessage, innerException) { }
    protected CustomException(SerializationInfo info, StreamingContext context) : base(info, context) { }
}