virtualizing treeview in silverlight -

i using silverlight toolkit treeview show set of data. has 1000 elements , of child elements have as 500 child elements well. takes minute load data , show in treeview. tree view have virtualization? if does, 1 point me sample or code snippet please?

following xaml

<controls:treeview grid.column="0" verticalalignment="stretch"                                itemssource="{binding people}" >         <controls:treeview.itemtemplate>             <common:hierarchicaldatatemplate itemssource="{binding children}">                 <stackpanel>                     <grid>                         <grid.columndefinitions>                             <columndefinition width="10*"/>                             <columndefinition width="90*"/>                                           </grid.columndefinitions>                         <checkbox ischecked="{binding twostate}" grid.column="0"/>                         <textblock grid.column="1" text="{binding name}"/>                     </grid>                 </stackpanel>             </common:hierarchicaldatatemplate>         </controls:treeview.itemtemplate>     </controls:treeview> 

following person class use

public class person:inotifypropertychanged {     public string name { get; set; }     public int age { get; set; }     public bool twostate { get; set; }     public observablecollection<person> children { get; set; }      public person()     {         twostate = false;         children = new observablecollection<person>();     }      public event propertychangedeventhandler propertychanged;     private void notifypropertychanged(string info)     {         if (propertychanged != null)         {             propertychanged(this, new propertychangedeventargs(info));         }     } } 

you should take @ bea costa's article on matter. check out blog here. of 3.5, silverlight has opt-in virtualization tree view. 1 of things speed performance loading child nodes on demand. covers in article.

basically, boils down this: should load ui, need to.