c# - Why XamlParseException has place while LiveCharts loading? -

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i write c# wpf mvvm application using ms vs 2015 , .net framework 4.5.2. try use livecharts. when livecharts loading folowing error has place: xamlparseexception in presentationframework.dll. not load file or assembly "livecharts.wpf, publickeytoken=3b585c2a5f1a92c1" or 1 of dependencies. below present xaml:

<usercontrol x:class="devicereading.views.devicereadingview"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:prism="http://prismlibrary.com/"              xmlns:lvc="clr-namespace:livecharts.wpf;assembly=livecharts.wpf"              xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"              prism:viewmodellocator.autowireviewmodel="true">  <grid>     <grid.rowdefinitions>         <rowdefinition/>     </grid.rowdefinitions>     <grid.columndefinitions>         <columndefinition/>     </grid.columndefinitions>      <lvc:cartesianchart grid.row="0" grid.column="0">         <lvc:cartesianchart.series>             <lvc:lineseries values="{binding myobservablecolection}" pointgeometrysize="10" strokethickness="2"/>         </lvc:cartesianchart.series>         <lvc:cartesianchart.axisx>             <lvc:axis labelformatter="{binding datetimeformatter}" maxvalue="{binding axismax}" minvalue="{binding axismin}" disableanimations="true">                 <lvc:axis.separator>                     <lvc:separator step="{binding axisstep}"/>                 </lvc:axis.separator>             </lvc:axis>         </lvc:cartesianchart.axisx>     </lvc:cartesianchart> </grid> </usercontrol>

here usercontrol prism usercontrol , myobservablecolection instance of

observablecollection<tuple<datetime, double>>

this collection comprises real-time data want show in cartesian chart. tryed remove code view model usercontrol bound abovementioned error continues occur. in references section of prismmodule usercontrol livecharts added folowing references: livecharts ver.0.7.10.0 , livecharts.wpf ver.0.7.10.0. started use livecharts today i'm green rookie in livecharts. please help.


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