override protected void ButtonDefinition_OnExecute(NameValueMap context)
 {
     try
     {
         PartDocument doc      = (PartDocument)AddInServer.m_inventorApplication.ActiveDocument;
         DataItem     material = DataMapping.Instance().Item(doc.ComponentDefinition.Material.InternalName.Trim());
         Process.Start(material.DiscoverLink());
     }
     catch (Exception e)
     {
         MessageBox.Show(e.ToString());
     }
 }