public EscherRecordTreeNode(EscherRecord record)
        {
            this.Record = record;
            this.Text = record.GetType().Name;
            if(record.ChildRecords.Count>0)
                this.ImageKey = "Folder";
            else
                this.ImageKey = "Binary";

            if (record is AbstractEscherOptRecord)
            {
                AbstractEscherOptRecord rec = ((AbstractEscherOptRecord)record);
                foreach (EscherProperty ep in rec.EscherProperties )
                {
                    EscherPropertyTreeNode cnode = new EscherPropertyTreeNode(ep);
                    this.Nodes.Add(cnode);
                }
            }
            else
            {
                GetChildren(this);
            }
        }