Cryptographic Interoperability: Digital Signatures

using System;
using System.Text;
using System.Security.Permissions;
using System.Runtime.Serialization;

  [Serializable]
  public sealed class BERDecodeException : Exception, ISerializable
  {
    private int m_position;
    public int Position
    { get { return m_position; } }

    public override string Message
    {
      get
      {
        StringBuilder sb = new StringBuilder(base.Message);

        sb.AppendFormat(" (Position {0}){1}",
          m_position, Environment.NewLine);

        return sb.ToString();
      }
    }

    public BERDecodeException()
      : base() { }

    public BERDecodeException(String message)
      : base(message) { }

    public BERDecodeException(String message, Exception ex)
      : base(message, ex) { }

    public BERDecodeException(int position)
    { m_position = position; }

    public BERDecodeException(String message, int position)
      : this( message ) { m_position = position; }

    public BERDecodeException(int position, Exception ex)
      : this( "", ex ) { m_position = position; }

    public BERDecodeException(String message, int position, Exception ex)
      : this(message, ex) { m_position = position; }

    private BERDecodeException(SerializationInfo info, StreamingContext context)
      : base( info, context)
    {
      m_position = info.GetInt32("Position");
    }

    [SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
    public override void GetObjectData(SerializationInfo info, StreamingContext context)
    {
      base.GetObjectData(info, context);
      info.AddValue("Position", m_position);
    }
  }