Đoạn code này thích hợp để tạo một database để lưu những đối tượng cần lưu có thể sử dụng như cache vậy

/// <summary>
/// Function to save object to external file
/// </summary>
/// <param name="_Object">object to save</param>
/// <param name="_FileName">File name to save object</param>
/// <returns>Return true if object save successfully, if not return false</returns>
public bool ObjectToFile(object _Object, string _FileName)
{
    try
    {
        // create new memory stream
        System.IO.MemoryStream _MemoryStream = new System.IO.MemoryStream();

        // create new BinaryFormatter
        System.Runtime.Serialization.Formatters.Binary.BinaryFormatter _BinaryFormatter
                    = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();

        // Serializes an object, or graph of connected objects, to the given stream.
        _BinaryFormatter.Serialize(_MemoryStream, _Object);

        // convert stream to byte array
        byte[] _ByteArray = _MemoryStream.ToArray();

        // Open file for writing
        System.IO.FileStream _FileStream = new System.IO.FileStream(_FileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);

        // Writes a block of bytes to this stream using data from a byte array.
        _FileStream.Write(_ByteArray.ToArray(), 0, _ByteArray.Length);

        // close file stream
        _FileStream.Close();

        // cleanup
        _MemoryStream.Close();
        _MemoryStream.Dispose();
        _MemoryStream = null;
        _ByteArray = null;

        return true;
    }
    catch (Exception _Exception)
    {
        // Error
        Console.WriteLine("Exception caught in process: {0}", _Exception.ToString());
    }

    // Error occured, return null
    return false;
}

Sử dụng:

ObjectToFile(pictureBox1.Image, "c:\\image-object.dat");