于XAML导入命名空间的代码

<Window x:Class="Demo002.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:Demo002"
        Title="MainWindow" Height="350" Width="525">
    <Grid x:Name="Grid1">
        <Grid x:Name="Grid2">
            <Grid x:Name="Grid3">
                <StackPanel x:Name="StackPanel1">
                    <ListBox x:Name="ListBox1" />
                    <local:TimeButton x:Name="TimeButton1" Width="80" Height="80" 
                                      Content="Report Time" />
                </StackPanel>
            </Grid>
        </Grid>
    </Grid>
</Window>