<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">        <Grid.RowDefinitions>            <RowDefinition Height="Auto"/>            <RowDefinition Height="*"/>        </Grid.RowDefinitions>        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,35,0,28">            <TextBlock Text="我的应用程序" FontSize="20"  />            <TextBlock Text="TextBlock" FontSize="60" />        </StackPanel>        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">            <StackPanel x:Name="stackPanel">                <TextBlock x:Name="TextBlock2" FontSize="20" Height="30" Text="你好，我是TextBlock控件" Foreground="Red" ></TextBlock>                <TextBlock FontSize="20">                    <TextBlock.Inlines>                        <Run  FontWeight="Bold" FontSize="14" Text="TextBlock. " />                        <Run FontStyle="Italic" FontSize="18" Text="linear gradient text. ">                            <Run.Foreground>                                <LinearGradientBrush>                                    <GradientStop Color="Green" Offset="0.0" />                                    <GradientStop Color="Purple" Offset="0.25" />                                    <GradientStop Color="Orange" Offset="0.5" />                                    <GradientStop Color="Blue" Offset="0.75" />                                </LinearGradientBrush>                            </Run.Foreground>                        </Run>                        <Run FontStyle="Italic" Foreground="Green" Text=" green " />                        <Span Foreground="Green">Span</Span>                    </TextBlock.Inlines>                </TextBlock>                <TextBlock FontSize="20">                             你好!                     <LineBreak/>                    我是TextBlock                    <LineBreak/>                    再见                    <LineBreak/>                    --2014年6月8日                </TextBlock>                <TextBlock TextWrapping="Wrap" FontSize="20">                             好像内容太长长长长长长长长长长长长长长长长长长了                </TextBlock>                <!--                TextTrimming - 文字溢出时的显示方式                    TextTrimming.None - 不做任何处理                    TextTrimming.WordEllipsis - 在边界处，用省略号代替剩余文本            -->                <TextBlock FontSize="15" HorizontalAlignment="Left" Text="文字溢出时的显示方式" Width="200" TextTrimming="WordEllipsis" />                 <TextBlock Text="颜色变变变变变变" FontSize="30">                    <TextBlock.Foreground>                        <LinearGradientBrush>                            <GradientStop Color="#FF0000FF" Offset="0.0" />                            <GradientStop Color="#FFEEEEEE" Offset="1.0" />                        </LinearGradientBrush>                    </TextBlock.Foreground>                </TextBlock>                <!--                FrameworkElement.FlowDirection - 指定文本或界面元素在它们的父元素中的流动方向                    FlowDirection.LeftToRight - 内容从左到右流动（默认值）                    FlowDirection.RightToLeft - 内容从右到左流动            -->                <TextBlock FontSize="18" HorizontalAlignment="Left" Text="从右到左流动" Width="200" FlowDirection="RightToLeft" />                <TextBlock FontSize="18" HorizontalAlignment="Left" Text="从左到右流动" Width="200" FlowDirection="LeftToRight" />                <TextBlock FontSize="18" Name="lblSource" IsTextSelectionEnabled="True" SelectionChanged="txt_SelectionChanged_1">                    <TextBlock.Inlines>                        <Run>测试文本是否可被选中</Run>                                               </TextBlock.Inlines>                </TextBlock>            </StackPanel>        </Grid>    </Grid>