gstreamer/gstreamer-sharp/Bin.custom

    [DllImport ("gstreamersharpglue-0.10")]
    private extern static uint gstsharp_gst_bin_get_children_offset();

    static uint children_offset = gstsharp_gst_bin_get_children_offset();

    public Element [] Children {
        get {
            GLib.List list;
            
            unsafe {
                IntPtr* raw_ptr = (IntPtr*)(((byte*)Handle) + children_offset);
                list = new GLib.List((*raw_ptr));
            }
            
            Element [] result = new Element[list.Count];
            
            for(int i = list.Count - 1; i >= 0; i--) {
                result[i] = list[i] as Element;
            }
            
            return result;
        }
    }

    [DllImport("gstreamer-0.10.dll")]
    static extern bool gst_bin_add(IntPtr raw, IntPtr element);

    public bool Add(Gst.Element element) {
//	if(element !=null)
//		element.Refcount++;
	bool raw_ret = gst_bin_add(Handle, element == null ? IntPtr.Zero : element.Handle);
	bool ret = raw_ret;
	return ret;
    }

    public bool AddMany(params Element[] elements)
    {
        if(elements == null) {
            return false;
        }
        
        foreach(Element element in elements) {
            if(element == null || !Add(element)) {
                return false;
            }
        }
        
        return true;
    }