C#

[Serializable()]
public class BackupFile : ISerializable
{
	private string _filename = "";
	private byte[] _filedata = null;
 
	public string Filename
	{
		get { return _filename; }
		set { _filename = value; }
	}
 
	public byte[] FileData 
	{
		get { return _filedata; }
		set { _filedata = value; }
	}
 
	// Don't allow default constructor use
	private BackupFile() { }
 
	public BackupFile(string filename)
	{
		Filename = filename;
		FileData = null;
	}
 
	public BackupFile(SerializationInfo info, StreamingContext context)
	{
		byte [] tempB = new byte[1];

		Filename = (string) info.GetValue("filename", typeof(string));
		FileData = (byte[]) info.GetValue("filedata", temp.GetType());
 
		WriteFileToDisk();
 
		FileData = null; // "free" the memory used by the file
	}
 
	public void GetObjectData(SerializationInfo info, StreamingContext context)
	{
		FileData = LoadFileFromDisk();
 
		info.AddValue("filename", Filename, Filename.GetType());
		info.AddValue("filedata", FileData, FileData.GetType());
 
		FileData = null;  // "free" the memory used by the file
	}
 
	private void WriteFileToDisk()
	{
		// Open the file specified by Filename and write the bytes stored in 
		// FileData to it
	}
 
	private void LoadFileFromDisk()
	{
		// Open the file specified by Filename and copy the data from the stream
		// to FileData
	}
}