title: property content is set more once
body: <p>I give error the property content is set more once.</p>
  
  <p>How I can place stackpanel and listview in one page?</p>
  
  <p>I want to place ddl in stackpanel</p>
  
  <pre><code> &lt;UserControl x:Class="D.O.L.U.U"
                   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  
          &lt;StackPanel Orientation="Horizontal" Margin="0,0,0,17"&gt;
           &lt;/StackPanel&gt;
  
      &lt;ListView ItemsSource="{Binding DataContext, RelativeSource={RelativeSource Self}}" SelectionChanged="Changed"&gt;
              &lt;ListView.ItemContainerStyle&gt;
                  &lt;Style TargetType="ListViewItem"&gt;
                      &lt;EventSetter Event="PreviewMouseLeftButtonUp" Handler="Click" /&gt;
                  &lt;/Style&gt;
              &lt;/ListView.ItemContainerStyle&gt;
              &lt;ListView.ItemTemplate&gt;
                  &lt;DataTemplate&gt;
                          &lt;Grid&gt;
                              &lt;TextBlock Text="{Binding Path=Name}"/&gt;
                          &lt;/Grid&gt;
                  &lt;/DataTemplate&gt;
              &lt;/ListView.ItemTemplate&gt;
          &lt;/ListView&gt;
  </code></pre>