wpf写的插件，不能显示图片资源，

写了一个支持插件的软件A，就是在程序里调用另一个程序集B，发现：单独运行B 程序正常，能够显示各种资源包括图片图标能够正常显示，但当在A里面调用B显示出来的时候，图片资源就显示不出来了。

<Window x:Class="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:Flybird.Test.程序集资源" 
        mc:Ignorable="d"
        Title="显示程序集资源图片" Height="450" Width="800">
    <Window.Resources >
        <BitmapImage x:Key="mycad1" UriSource="/Resources/cad1.ico"/>
    </Window.Resources>
    <StackPanel >
        <TextBlock Text="下面是引用资源一个图标："/>
        <Image Source="{StaticResource mycad1 }" Width="32" Height="32" Margin="5" HorizontalAlignment="Left"/>
        <TextBlock Text="下面是引用路径一个图标："/>
        <Image Source="/Resources/cad1.ico" Width="48" Height="48" HorizontalAlignment="Left" Margin="5"/>
    </StackPanel>
</Window>

上面是被调用的程序集B的窗体代码，cad1.ico是一个图标，生成方式：resources

<Window x:Class="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:测试引用程序集"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <StackPanel >
        <Button Content="打开程序集窗体" Click="Button_Click" Width="150" Height="38" HorizontalAlignment="Left"  />
        <Button Content="直接打开exe" Click="Button_Click_1" Width="150" Height="38" HorizontalAlignment="Left" />
    </StackPanel>
       
    
</Window>

Class MainWindow
    Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
        Dim frm As New Flybird.Test.程序集资源.MainWindow
        frm.Show()
    End Sub

    Private Sub Button_Click_1(sender As Object, e As RoutedEventArgs)
        Dim path As String = AppDomain.CurrentDomain.BaseDirectory
        Dim spath As String = "..\..\..\程序集资源\bin\Debug\程序集资源测试.exe"
        Dim f As String = IO.Path.Combine(path, spath)
        'f = IO.Path.GetFullPath(f)
        'If IO.File.Exists(f) Then
        '    Dim p As New Process()
        '    Process.Start(f)
        'End If
        f = IO.Path.GetFullPath(f)
        If IO.File.Exists(f) Then
            Dim p As New Process()
            Process.Start(f)
        End If
    End Sub
End Class

这是程序A的前台和后台代码

中间的那张图片就是通过程序集打开的，右边的就是直接运行的，通过程序集运行的显示不了图元。