wp7 后台创建DateTelplate模板

private DataTemplate GetTemplate(string msg)
{
string xamlString = @"<DataTemplate
xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml"">
<TextBlock Text=""" + msg + @""" HorizontalAlignment=""Center"" VerticalAlignment=""Center""/>
</DataTemplate>";
return (DataTemplate)XamlReader.Load(xamlString);
}

关于这段代码如何在后台创建by 小小