c# - Conditional Resources Creation WPF XAML Design / Run time -

following first question on wpf cascading binding,

i remarked had more resources desired defined in both mainwindow , usercontrols:

this seen in snoop

• the mainwindow xaml has "instance" of mainwindow viewmodel paints 2 usercontrol in green , blue

• additionnaly there 2 instances of usercontrol viewmodels each of 2 usercontrols paint inner circle in red

1. my first intention in usercontrol able see "live" how control ( painted red distinguish "model" green , blue circles in main window)
2. my resources cheap create, no matter if have 2 resources still living in application, anticipate time resources more expensive...

finally question :

how can conditionnaly let resources created in "low level" control ( can have preview in view of control ) but prevent creation when running full application ( or view of main window ) because bind resources of upper level.

many in advance.

best regards.

ngi

i prepared simplified way out displaying 1 data during design time , latter during run time. find useful , adjust case.

xaml:

<window.resources>     <datatemplate x:key="designmodedatatemplate">         <textblock text="design mode"/>     </datatemplate>     <datatemplate x:key="runtimedatatemplate">         <textblock text="run time"/>     </datatemplate>     <local:isindesignmodeconverter x:key="isindesignmodeconverter"/> </window.resources> <contentcontrol>     <contentcontrol.contenttemplate>         <multibinding converter="{staticresource isindesignmodeconverter}">             <binding source="{staticresource designmodedatatemplate}"/>             <binding source="{staticresource runtimedatatemplate}"/>         </multibinding>     </contentcontrol.contenttemplate> </contentcontrol> 

converter:

 class isindesignmodeconverter : imultivalueconverter {     public object convert(object[] values, type targettype, object parameter, system.globalization.cultureinfo culture)     {         if ((bool)(designerproperties.isindesignmodeproperty.getmetadata(typeof(dependencyobject)).defaultvalue))             return values[0];         return values[1];     }      public object[] convertback(object value, type[] targettypes, object parameter, system.globalization.cultureinfo culture)     {         throw new notimplementedexception();     } } 

as result display design mode text during design time , run time when running. in case instead of textblock can insert defined resources.