c# - How after updating data from one of the UI (at network) reload data at other UIs and keep relatioship? -

when add entity data model mysql database wpf application , collectionviewsource created both parent , child tables like:

    <collectionviewsource x:key="topicmainviewsource" d:designsource="{d:designinstance {x:type dbmrcpe:topicmain}, createlist=true}"/>     <collectionviewsource x:key="articlesrelatedviewsource" source="{binding topicsublev1, source={staticresource topicmainviewsource}}"/> 

and create datacontext grid , binding radgridviews like

<grid name="maingrid" datacontext="{staticresource topicmainviewsource}">      <telerik:radgridview x:name="topicmaingridview"  datamember="idtopicmain" itemssource="{binding}" />     <telerik:radgridview x:name="articlesrelatedradgridview" itemssource="{binding source={staticresource articlesrelatedviewsource}}" />  </grid> 

and code load data @ cs

dbmrcpe.dbmrcpnephrologyentities ctx = new dbmrcpe.dbmrcpnephrologyentities();     private void window_loaded(object sender, routedeventargs e)     {         ctx = new dbmrcpe.dbmrcpnephrologyentities();          system.windows.data.collectionviewsource topicmainviewsource = ((system.windows.data.collectionviewsource)(this.findresource("topicmainviewsource")));         // load data setting collectionviewsource.source property:         topicmainviewsource.source = ctx.topicmains;     } 

the question : if user add data gridview @ runtime , how reload data other user interfaces @ runtime if refersh button used without loos relation ship between 2 grids?

thanks ever 1 solved after question

by add new referance datacontext like

private void reloadbtn_click(object sender, routedeventargs e)     {      dbmrcpe.dbmrcpnephrologyentities ctx2 = new dbmrcpe.dbmrcpnephrologyentities();      ctx = ctx2;      topicmainviewsource.source = ctx.topicmains;      } 

if use topicmainviewsource.source = ctx.topicmains; directly not load new data want use ctx.savechanges() allover code