visual studio 2010 - How to make wpf combobox remember the previous selected value even if change it to new value? -

i want display default/selected value of wpf combobox bold when user selects new value combobox items. how make wpf combobox remember previous selected value , make bold user can identify previous value bold.

kindly help?

thanks

how objects of combobox created? add boolean property called defaultselected class , use datatemplate triggers in combo box style 1 object defaultselected = true.

      <datatemplate x:key="combotemplate" >             <stackpanel orientation="horizontal">                 <textblock x:name="mytextblock" text="{binding objectname}" verticalalignment="center"  />             </stackpanel>             <datatemplate.triggers>                 <datatrigger binding="{binding defaultselected}" value="true" >                     <datatrigger.setters>                         <setter targetname="mytextblock"                          property="fontweight"                          value="bold"/>                     </datatrigger.setters>                 </datatrigger>             </datatemplate.triggers>         </datatemplate>                   <combobox                          itemssource="{binding mylist, mode=onetime}"                           itemtemplate="{dynamicresource combotemplate}">                                         </combobox> 

this untested, sorry should going in right direction

j