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POCannot create an instance of "[user control]" error in designer
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  1. POCannot create an instance of "[user control]" error in designer
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    copied!<p>I have created the following user control. When I add it to a xaml window, I get the error "Cannot create an instance of "ucAppItem". I dragged the user control onto the window from the toolbar.</p> <p>XAML of user control is as follows:</p> <pre><code>&lt;UserControl x:Class="Demos.ucAppItem" 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" mc:Ignorable="d" Width="852" Height="215"&gt; &lt;Grid&gt; &lt;Label Name="lblTitle" Content="Title" HorizontalAlignment="Left" Margin="233,10,0,0" VerticalAlignment="Top" FontSize="22" FontFamily="Arial"/&gt; &lt;Image Width="40" Height="40" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="0,0,80,0"&gt; &lt;Image.Style&gt; &lt;Style TargetType="{x:Type Image}"&gt; &lt;Setter Property="Source" Value="pack://siteoforigin:,,,/arrow2.png"/&gt; &lt;Style.Triggers&gt; &lt;Trigger Property="IsMouseOver" Value="True"&gt; &lt;Setter Property="Source" Value="pack://siteoforigin:,,,/arrow1.png"/&gt; &lt;/Trigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/Image.Style&gt; &lt;/Image&gt; &lt;Label x:Name="lblRun" Content="Run" HorizontalAlignment="Right" Margin="0,88,35,0" VerticalAlignment="Top" Foreground="#FF2EAADC" FontSize="20"&gt; &lt;Label.Style&gt; &lt;Style TargetType="{x:Type Label}"&gt; &lt;Setter Property="Foreground" Value="#FF2EAADC"/&gt; &lt;Style.Triggers&gt; &lt;Trigger Property="IsMouseOver" Value="True"&gt; &lt;Setter Property="Foreground" Value="#006d9e"/&gt; &lt;/Trigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/Label.Style&gt; &lt;/Label&gt; &lt;/Grid&gt; &lt;/UserControl&gt; </code></pre> <p>XAML of window is as follows:</p> <pre><code>&lt;Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Demos" x:Class="Demos.Window1" Title="Window1" Height="487" Width="854"&gt; &lt;Grid&gt; &lt;local:ucAppItem/&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p>Thanks for your help in advance!</p>
 

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