partial void DeleteArticulo(Articulo instance);
 partial void UpdateArticulo(Articulo instance);
		private void detach_Articulo(Articulo entity)
		{
			this.SendPropertyChanging();
			entity.Usuario = null;
		}
 partial void InsertArticulo(Articulo instance);
		private void attach_Articulo(Articulo entity)
		{
			this.SendPropertyChanging();
			entity.Usuario = this;
		}