c# - Frame doesn't work anymore after adding template -

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i'm trying learn wpf, created resource dictionary template frame after adding template frame doesn't display pages anymore. when remove template, works again (the pages displayed). doing wrong?

resourcedictionary.xaml (just basic)

<resourcedictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"                 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">  <controltemplate x:key="frametemplate" targettype="{x:type frame}">     <grid>         <border borderbrush="tomato" borderthickness="3" background="bisque"/>     </grid> </controltemplate>  </resourcedictionary>

mainwindow.xaml

<window.resources>     <resourcedictionary>         <resourcedictionary.mergeddictionaries>             <resourcedictionary source="/resources/icons.xaml" />             <resourcedictionary source="resourcedictionary.xaml"/>         </resourcedictionary.mergeddictionaries>     </resourcedictionary> </window.resources>  <controls:metrowindow.rightwindowcommands>     <controls:windowcommands>         <togglebutton content="menu"      ischecked="{binding elementname=flyout, path=isopen}" cursor="hand"/>     </controls:windowcommands> </controls:metrowindow.rightwindowcommands>  <grid>      <grid x:name="menu_grid">     </grid>      <!-- flyout here, title bar not overlapped -->     <controls:flyout x:name="flyout"                    width="200"                    header="menu"                    isopen="true"                    position="left">         <stackpanel>             <button horizontalcontentalignment="center" verticalalignment="center" margin="10" click="driverbutton_click">                 <stackpanel orientation="horizontal">                     <rectangle height="16" width="16" margin="5">                         <rectangle.fill>                             <visualbrush visual="{staticresource appbar_people}" stretch="fill" />                         </rectangle.fill>                     </rectangle>                     <textblock verticalalignment="center" horizontalalignment="center">drivers</textblock>                 </stackpanel>             </button>             <button horizontalcontentalignment="center" verticalalignment="center" margin="10" click="seasonbutton_click">                 <stackpanel orientation="horizontal">                     <rectangle height="16" width="16" margin="5">                         <rectangle.fill>                             <visualbrush visual="{staticresource appbar_calendar}" stretch="fill" />                         </rectangle.fill>                     </rectangle>                     <textblock verticalalignment="center" horizontalalignment="center">seasons</textblock>                 </stackpanel>             </button>             <button horizontalcontentalignment="center" verticalalignment="center" margin="10" click="constructorsbutton_click">                 <stackpanel orientation="horizontal">                     <rectangle height="16" width="16" margin="5">                         <rectangle.fill>                             <visualbrush visual="{staticresource appbar_team}" stretch="fill" />                         </rectangle.fill>                     </rectangle>                     <textblock verticalalignment="center" horizontalalignment="center">constructors</textblock>                 </stackpanel>             </button>         </stackpanel>     </controls:flyout>      <grid margin="200 0 0 0">         <frame x:name="_mainframe" template="{staticresource frametemplate}" />                     </grid>  </grid>

mainwindow.xaml.cs

public partial class mainwindow  {     driverspage driverspage = new driverspage();     seasonpage seasonspage = new seasonpage();     constructorspage constructorspage = new constructorspage();      public mainwindow()     {         initializecomponent();     }      private void driverbutton_click(object sender, routedeventargs e)     {         _mainframe.navigate(driverspage);     }      private void seasonbutton_click(object sender, routedeventargs e)     {         _mainframe.navigate(seasonspage);     }      private void constructorsbutton_click(object sender, routedeventargs e)     {         _mainframe.navigate(constructorspage);     } }

when override controltemplate, need supply entire template control. supplying grid border in it, going render. if @ example template frame, see there lot more there. suspect important piece need display page content presenter named "part_framecp". try adding template.

<contentpresenter x:name="part_framecp" />

named parts important in templates because control them. sometimes, unnamed parts searched type , therefore may important well. idea read , understand example template when creating template of own.


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