c# - Why can't I override the default BasedOn Style? WPF -

i have default label style

<style x:key="labelstyle" targettype="{x:type label}"> <setter property="fontfamily" value="segoe ui" /> <setter property="fontsize" value="13.333" /> <setter property="foreground" value="{staticresource foregroundbrush}" /> <setter property="istabstop" value="false" /> <setter property="horizontalcontentalignment" value="left" /> </style>  <style basedon="{staticresource labelstyle}" targettype="{x:type label}" /> 

i try use different style single label

    <style x:key="headerlabelstyle" targettype="{x:type label}">     <setter property="fontfamily" value="segoe ui" />     <setter property="fontsize" value="16" />     <setter property="foreground" value="{staticresource headerforegroundbrush}" />     <setter property="istabstop" value="false" />     <setter property="horizontalcontentalignment" value="left" />     </style>  <label  content="text here"  name="somename" style="{staticresource headerlabelstyle}"/> 

but reason label gets default style. why? can overridden?

thanks

so realised default (string) template label indented textblock (styles inherited)

since defining global style textblock

<style x:key="textblockstyle" targettype="textblock"> <setter property="foreground" value="{staticresource foregroundbrush}" /> <setter property="fontsize" value="13.333" /> <setter property="fontfamily" value="segoe ui" /> <style basedon="{staticresource textblockstyle}" targettype="{x:type textblock}" /> 

no matter how many types of label had bound use template textblock

so solution define dummy textblock class

namespace theme {     public class headertextblock : textblock     {     } } 

then assign own global style

xmlns:this="clr-namespace:theme"  <style x:key="headertextblockstyle" targettype="this:headertextblock">     <setter property="foreground" value="{staticresource headerforegroundbrush}" />     <setter property="fontsize" value="13.333" />     <setter property="fontfamily" value="segoe ui" /> </style> <style basedon="{staticresource headertextblockstyle}" targettype="{x:type this:headertextblock}" /> 

and use textblocks instead of labels (haven't figured out how implement label child yet since (label : textblock) = false

xmlns:theme="clr-namespace:theme;assembly=theme" <theme:headertextblock text="some text"  name="titlelabel" style="{staticresource headertextblockstyle}"/> 

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