c# - Compile time error when styling BaseView like LoadingDecorator -

for instance have next code baseview:

using system.windows; using devexpress.xpf.core;  namespace infrastructure.baseview {     public class baseview : loadingdecorator     {         public baseview()         {             style = findresource("baseviewstyle") style;         }     } } 

style:

<style targettype="{x:type baseview:baseview}" x:key="baseviewstyle" >     <setter property="ownerlock" value="inputonly"/>     <style.triggers>         <datatrigger binding="{binding state}" d:datacontext="{d:designinstance type=baseviewmodel:baseviewmodel}">             <datatrigger.value>                 <enums:viewstate>busy</enums:viewstate>             </datatrigger.value>             <setter property="issplashscreenshown" value="true" />         </datatrigger>          <datatrigger binding="{binding state}" d:datacontext="{d:designinstance type=baseviewmodel:baseviewmodel}">             <datatrigger.value>                 <enums:viewstate>default</enums:viewstate>             </datatrigger.value>             <setter property="issplashscreenshown" value="false" />         </datatrigger>     </style.triggers> </style> 

then create specific view this(name space definition not simple because view has complex ui):

<baseview:baseview x:class="general.views.projectlistview"          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"          xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"           xmlns:d="http://schemas.microsoft.com/expression/blend/2008"          xmlns:baseview="clr-namespace:infrastructure.baseview;assembly=infrastructure"          xmlns:viewmodels="clr-namespace:general.viewmodels"          xmlns:dxprg="http://schemas.devexpress.com/winfx/2008/xaml/propertygrid"          xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"          xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"          xmlns:dxb="http://schemas.devexpress.com/winfx/2008/xaml/bars"          mc:ignorable="d"           d:designheight="300" d:designwidth="1000"           d:datacontext="{d:designinstance type=viewmodels:projectlistviewmodel, isdesigntimecreatable=true}"          x:name="view" ... </baseview:baseview> 

in run time works perfect, have compile time error:

error 4 cannot create instance of "baseview".

and designer in vs not work. , in it's stacktrace can watch next information

at system.windows.style.checktargettype(object element)

at system.windows.stylehelper.updatestylecache(frameworkelement fe, frameworkcontentelement fce, style oldstyle, style newstyle, style& stylecache)

at system.windows.frameworkelement.onstylechanged(dependencyobject d, dependencypropertychangedeventargs e)

...

i realized problem in targettype="{x:type baseview:baseview}" in style, without code style shows me errors , not works , understand it.

how can remove compile time error? ok use loadingdecorator baseview? think if have views in display , of can busy, - not. so, thought good.

i use prism in app , thought take out loadingdecorator in shell.xaml beyond every regions in case don't understand how can bind issplashscreenshown specific viewmodel of specific view.