当代码编译。x:Code 元素的内容将被放到.g.cs文件。

<Window x:Class="WpfApplication7.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Button Background="{x:Null}"
                Height="32"
                x:Name="Btn"
                Click="Btn_Click"
                Width="{x:Static SystemParameters.IconWidth}"
                Content="{Binding Path=Width,RelativeSource={RelativeSource Self}}"
                >
            </Button>
        <x:Code>
            <![CDATA[
            void Btn_Click(object sender,RoutedEventArgs e)
            {
                 this.Close();
            }
            ]]>
        </x:Code>
    </Grid>
</Window>