[b]could you please provide a complete example for SerializeTag and DeserializeTag?[/b]

I have objects attached to the Tag property of Boxes and AnchorPoints and am able to serialize them into an XML file:

[code]
<Box ...>
  ...
  <Tag>
    <Filter Type="-some-string-here-" />
  </Tag>
  ...
</Box>
[/code]

using the following event handler:

[code]
void Writer_SerializeTag(object sender, SerializeTagArgs e) {
    if (e.Object is ChartObject) {
       ChartObject Node = (ChartObject)e.Object;
       if (Node.Tag is IFilter) {
           // Filter element
           e.XmlWriter.WriteStartElement("Filter");

           // Type attribute
           e.XmlWriter.WriteStartAttribute("Type");
           e.XmlWriter.WriteValue(Node.Tag.GetType().FullName);
           e.XmlWriter.WriteEndAttribute();

           e.XmlWriter.WriteEndElement();
       }

}
}
[/code]

when calling the Read() method of the XML reader, DeserializeTag gets called as expected:

[code]
void Reader_DeserializeTag(object sender, SerializeTagArgs e) {
    if (e.Object is ChartObject) {
       if (e.XmlReader.IsStartElement("Filter")) {
           Box Node = (Box)e.Object;
           string strTypeName = e.XmlReader.GetAttribute("Type");
           Node.Tag = (Activator.CreateInstance( Type.GetType(strTypeName) ) as IFilter);
       }   

}
}
[/code]

the object gets instanciated properly, however, a moment later Read() throws the following exception:

[code]
MindFusion.FlowChartX.Xml.InvalidFormatException: ControlHosts element missing or invalid
   at MindFusion.FlowChartX.Xml.XmlReader.x4cee5b00d96d6dfb(...)
   ...
[/code]

am i doing something wrong or is there a bug in FlowCharter.FX (latest build from website)?

If you have already set these properties, make sure the reader reads as many XML elements as the writer writes, or else the control would continue reading from a wrong position in the XmlReader stream.

Stoyan