c# - Application crashing when using <Run Text={Binding ...}/> with certain properties in a textblock -

i using <run text={binding ...}/> inside textblock in order concatenate 2 strings (one hard coded, other 1 binding expression on property). being done in datatemplate :

<resourcedictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">      <datatemplate x:key="marketorderdatatemplate">         <grid>             <grid.rowdefinitions>                 <rowdefinition height="auto"/>             </grid.rowdefinitions>             <grid.columndefinitions>                 <columndefinition width="auto"/>                 <columndefinition width="auto"/>                 <columndefinition width="30*"/>                 <columndefinition width="auto"/>                 <columndefinition width="70*"/>             </grid.columndefinitions>              <!-- item icon todo: add icon-->             <image grid.column="0" margin="10,0,10,0"  stretch="fill" source="../../images/thumb_icon-mineral-protoss.png" />              <separator grid.column="1" style="{staticresource {x:static toolbar.separatorstylekey}}" />              <!-- item information -->             <grid grid.column="2" margin="10,0,10,0" horizontalalignment="center">                 <grid.rowdefinitions>                     <rowdefinition height="33*"/>                     <rowdefinition height="33*"/>                     <rowdefinition height="33*"/>                 </grid.rowdefinitions>                 <grid.columndefinitions>                     <columndefinition width="*"/>                 </grid.columndefinitions>                  <textblock grid.row="0">                     <run text="item name : "/>                     <run text="{binding item.itemname}"/>                 </textblock>                 <textblock grid.row="1">                     <run text="item id : "/>                     <run text="{binding item.itemid}"/>                 </textblock>                 <textblock grid.row="2">                     <run text="item type : "/>                     <run text="{binding item.itemtype}"/>                 </textblock>             </grid>              <separator grid.column="3" style="{staticresource {x:static toolbar.separatorstylekey}}" />              <!-- market order information -->             <grid grid.column="4" margin="10,0,10,0" horizontalalignment="center">                 <grid.rowdefinitions>                     <rowdefinition height="33*"/>                     <rowdefinition height="33*"/>                     <rowdefinition height="33*"/>                 </grid.rowdefinitions>                 <grid.columndefinitions>                     <columndefinition width="*"/>                 </grid.columndefinitions>                  <textblock grid.row="0">                     <run text="market order id : "/>                     <run text="{binding orderid}"/>                 </textblock>                 <textblock grid.row="1">                     <run text="price : "/>                     <run text="{binding price}"/>                 </textblock>                 <textblock grid.row="2">                     <run text="volume remaining : "/>                     <run text="{binding volumeremaining}"/>                 </textblock>             </grid>         </grid>     </datatemplate>  </resourcedictionary> 

this works in item information part of datatemplate (with bindings on item.itemname, item.itemid, item.itemtype) without problems. when try same market order information part of datatemplate (with bindings on orderid, price, volumeremaining) though, makes application crash reason.

it works if set textproperty on textblock same binding expression, not know why makes application crash <run text={binding ...}/> syntax on market order info part?

you did not show view model or error can suspect it's because property read-only , run default bind both ways. change binding oneway

<run text="{binding volumeremaining, mode=oneway}"/>