In WinForm's resource file, all non-text content such as porturebox image attribute into text saves, which is achieved by serialization, examples:
// use system.runtime.serialization.formatters.soap;
Stream Stream = New FileStream ("E: //Image.xml", FileMode.create, FileAccess.write, Fileshare.none;
SOAPFORMATTER F = New soapFormatter ();
Image img = image.fromfile ("e: //image.bmp");
F.Serialize (Stream, IMG);
stream.close ();