public class Explorador_Directorio
{
private string Folder_Path; //al final no he usado esta variable ^_^

public Explorador_Directorio (string Folder_Path)
{
this.Folder_Path = Folder_Path;
}
public void DisplayFileInfo(string fileFullName, XmlTextWriter tw)
{
FileInfo TheFile = new FileInfo(fileFullName);
if (!TheFile.Exists)
throw new FileNotFoundException("File not found: "
+ fileFullName);
// escribimos en el xml el objeto de la imagen
tw.WriteStartElement("imagen");
tw.WriteElementString("name", TheFile.Name);
tw.WriteElementString("descripcion", "No hay descripcion");
tw.WriteElementString("tag", "No tag");
tw.WriteEndElement();
}

public void DisplayFolderList(string folderFullName)
{
DirectoryInfo TheFolder = new DirectoryInfo(folderFullName);
if (!TheFolder.Exists)
throw new DirectoryNotFoundException("Folder not found: "
+ folderFullName);

//creamos fichero xml
XmlTextWriter tw = new XmlTextWriter(folderFullName + "images.xml", null);
tw.Formatting = Formatting.Indented;
tw.WriteStartDocument();
tw.WriteStartElement("carpeta"); //dentro de una carpeta todas las images
tw.WriteAttributeString("name", TheFolder.Name);

//listamos los directorios recursivamente
foreach(DirectoryInfo NextFolder in TheFolder.GetDirectories())
DisplayFolderList(folderFullName + NextFolder.Name);

//listamos todos los ficheros de la carpeta
foreach(FileInfo NextFile in TheFolder.GetFiles())
DisplayFileInfo (folderFullName + NextFile.Name, tw);

tw.WriteEndElement();
tw.WriteEndDocument();
tw.Flush();
tw.Close();
//cerramos bien cerrados
}
}

class MainClass
{
public static void Main(string[] args)
{
Console.WriteLine("Img_to_XML v0.1");