<Window x:Class="WPFDemo.MainWindow"
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"
xmlns:local="clr-namespace:WPFDemo"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Window.Resources>
<DataTemplate DataType="{x:Type local:A}">
<TextBlock>A11111111111</TextBlock>
</DataTemplate>
<DataTemplate DataType="{x:Type local:B}">
<TextBlock>B22222222222</TextBlock>
</DataTemplate>
</Window.Resources>
<Grid>
<ContentControl Margin="0,0,0,0" Content="{Binding Path=PModel}"></ContentControl>
<ContentControl Margin="0,200,0,0" Content="{Binding Path=PModel}"></ContentControl>
</Grid>
</Window>
