如何向 PivotItem 添加多个项目/控件?
<!--Pivot Control-->
<phone:Pivot x:Name="PivotLanguageMain" Margin="0,116,0,0" Foreground="White" Background="{x:Null}">
<!--Pivot item one-->
<phone:PivotItem x:Name="PivotItemGurbani" Margin="0,-6,0,0" >
<phone:PivotItem.Header>
<TextBlock Text=" gurmuKI" FontFamily="/Assets/Fonts/GURAKHAR.TTF#GurbaniAkhar" />
</phone:PivotItem.Header>
<ListBox Margin="0,25,0,72" x:Name="ListBoxPunjabi" FontSize="48" HorizontalAlignment="Center" SelectionChanged="ListBoxPunjabi_SelectionChanged">
</ListBox>
</phone:PivotItem>
<!--Pivot item two-->
<phone:PivotItem x:Name="PivotItemEnglish" Margin="0,-6,0,0" >
<phone:PivotItem.Header>
<TextBlock Text=" english" FontFamily="/Assets/Fonts/AGENCYR.TTF#Agency FB" />
</phone:PivotItem.Header>
<ListBox Margin="0,25,0,48" x:Name="ListBoxEnglish" HorizontalAlignment="Center" SelectionChanged="ListBoxEnglish_SelectionChanged">
</ListBox>
<Popup x:Name="LoadingPopup">
<TextBlock x:Name="LoadingText" Text="Loading PDF File.." Foreground="#FFBB0000" FontFamily="/Assets/Fonts/AGENCYR.TTF#Agency FB" FontSize="50" FontWeight="Bold" Margin="102,164,93,360"/>
</Popup>
</phone:PivotItem>
</phone:Pivot>
第二个 PivotItem 给我错误: 属性“内容”只能设置一次