c# - Tooltip style. Can't bind to datacontext -

i have 1 problem tooltip. want add templated tooltip button information inside.

here button tooltip, datacontext bounded viewmodel:

<fluent:button datacontext="{binding newconnections, source={staticresource locator}}" command="{binding addcloudstorageaccount}" header="add account">                         <fluent:button.largeicon>                             <image source="pack://application:,,,/icons;component/ui/v1/add_account.png" width="48"/>                         </fluent:button.largeicon>                         <fluent:button.tooltip>                             <tooltip datacontext="{binding userinput.addaccountsbuttoninfo, source={staticresource locator}}" style="{staticresource buttontooltip}"></tooltip>                         </fluent:button.tooltip>                     </fluent:button> 

style:

 <style targettype="tooltip" x:key="buttontooltip">     <setter property="contenttemplate">         <setter.value>             <datatemplate>                 <border  background="lightyellow" borderthickness="0.5" borderbrush="maroon">                     <stackpanel orientation="vertical" margin="3">                         <textblock x:name="_txttext" text="{binding title}"></textblock>                         <textblock x:name="_txtdescription" margin="0 10 0 0" text="{binding description}"></textblock>                         <textblock x:name="_txthotkeydescription" margin="0 10 0 0" text="{binding hotkeydescription}"></textblock>                     </stackpanel>                 </border>             </datatemplate>         </setter.value>     </setter> </style> 

i set breakpoints see if viewmodel accessed. , it's ok. properties title not accessed @ , see empty rectangle without text

do have ideas?

just resolved it(set datacontext in border). maybe interested in:

<style targettype="tooltip" x:key="buttontooltip">     <setter property="contenttemplate">         <setter.value>             <datatemplate>                 <border  background="lightyellow" borderthickness="0.5" borderbrush="maroon" datacontext="{binding path=datacontext, relativesource={relativesource findancestor, ancestortype={x:type tooltip}}}">                     <stackpanel orientation="vertical" margin="3">                         <textblock x:name="_txttext" text="{binding title}"></textblock>                         <textblock x:name="_txtdescription" margin="0 10 0 0" text="{binding description}"></textblock>                         <textblock x:name="_txthotkeydescription" margin="0 10 0 0" text="{binding hotkeydescription}"></textblock>                     </stackpanel>                 </border>             </datatemplate>         </setter.value>     </setter> </style>