JohnSon:ContentControl动态加载Module，页面大小自由伸缩

<UserControl x:Class="XM.Shell"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    xmlns:prism="http://www.codeplex.com/prism">
    <!--prism:RegionManager.RegionName="ModuleLogin"-->
        <ContentControl  Name="myCC"
                        VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
                    VerticalContentAlignment="Stretch"  HorizontalContentAlignment="Stretch" />
    
</UserControl>