the property content is set more than once

Question

I am getting the following error with my code shown below.

Error:

The property 'Content' is set more than once

Code:

<controls:PanoramaItem Header="headlines">     <TextBlock Text="{Binding Tones}" />     <ListBox Margin="0,0,-12,0" ItemsSource="{Binding Tones}">         <ListBox.ItemTemplate>             <DataTemplate>                 <StackPanel Orientation="Horizontal" Margin="0,0,0,17">                     <Image Source="{Binding ImageUrl}" Height="75" Width="100"                         Margin="12,10,9,0" VerticalAlignment="Top"/>                     <StackPanel Width="311">                         <TextBlock Text="{Binding Title}" TextWrapping="Wrap"                             Style="{StaticResource PhoneTextLargeStyle}" />                     </StackPanel>                 </StackPanel>             </DataTemplate>         </ListBox.ItemTemplate>     </ListBox>                 </controls:PanoramaItem> 

Answer 1

A PanoramaItem can only have one child control but you currently have a TextBlock and a ListBox. To fix this, simply add another parent control to hold the TextBlock and ListBox (such as a StackPanel or a Grid). For example:

<controls:PanoramaItem Header="headlines">    <grid>         <TextBlock Text="{Binding Tones}" />         <!--Double line list with image placeholder and text wrapping-->         <ListBox Margin="0,0,-12,0" ItemsSource="{Binding Tones}">             <ListBox.ItemTemplate>                  <DataTemplate>                      <StackPanel Orientation="Horizontal" Margin="0,0,0,17">                          <!--Replace rectangle with image-->                          <Image Source="{Binding ImageUrl}" Height="75" Width="100" Margin="12,10,9,0" VerticalAlignment="Top"/>                          <!--<Rectangle Height="100" Width="100" Fill="#FFE5001b" Margin="12,0,9,0"/>-->                          <StackPanel Width="311">                               <TextBlock Text="{Binding Title}" TextWrapping="Wrap" Style="{StaticResource PhoneTextLargeStyle}"/>                               <!--<TextBlock Text="{Binding LineTwo}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>-->                          </StackPanel>                      </StackPanel>                   </DataTemplate>              </ListBox.ItemTemplate>         </ListBox>                   </grid>  </controls:PanoramaItem>