xaml - Change Grid Panel Border color Using C# programatically- WPF -

i have grid panel , want border color change when click on button

<grid grid.row="3"  name="locationlayoutpanel" verticalalignment="top"    margin="0,51,0,0" height="65" showgridlines="true">          <grid.columndefinitions>             <columndefinition width="*"   />             <columndefinition width="9*" />             <columndefinition width="2*" />         </grid.columndefinitions >   <border borderthickness="2,2,2,2" borderbrush="red" grid.columnspan="3"      grid.rowspan="2"/>      <button content="change border color" grid.row="1" grid.column="1"      click="chnagebgcolor"></button> </grid> 

when click on "change border color" button grid border color should changed!

thank you!

xaml:

      <border borderthickness="2,2,2,2" grid.columnspan="3"      grid.rowspan="2">             <border.style>                 <style targettype="border">                     <setter property="borderbrush" value="red"/>                     <style.triggers>                         <datatrigger binding="{binding elementname=button, path=ispressed}" value="true">                             <datatrigger.enteractions>                                 <beginstoryboard>                                     <storyboard>                                         <coloranimation storyboard.targetproperty="(border.borderbrush).(solidcolorbrush.color)"                                                         to="greenyellow"/>                                     </storyboard>                                 </beginstoryboard>                             </datatrigger.enteractions>                         </datatrigger>                     </style.triggers>                 </style>             </border.style>         </border>         <button name="button" content="change boarder color" grid.row="1" grid.column="1"></button> 

programically:

add name border , set follows:

bordername.borderbrush = new solidcolorbrush(colors.greenyellow);