用vb编写wpf窗口程序，为什么运行的时候老师弹出这个异常窗口啊
用vb编写wpf窗口程序，为什么运行的时候老师弹出这个错误窗口啊？
程序编写完后，老师弹出一个感叹号窗口，信息如下：
未处理的“System.IO.IOException”类型的异常出现在 PresentationFramework.dll 中。
其他信息: 找不到资源“window1.xaml”。
代码我是照着书上敲的。连续几个小题目都是这个样子， 把我郁闷惨了，有谁知道如何解决吗？小弟菜鸟，才入门，不知道怎么办，急死我了。谢谢了。
另外我弄不上来截图，只有把代码拷贝上来了：
//TextEditor.xaml
<Window x:Class="Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Text Editor" Height="460" Width="600">
<Grid>
<ToolBarPanel Height="26" Name="ToolBarPanel1" VerticalAlignment="Top">
<ToolBar Height="26" Name="ToolBar1" Width="575">
<Button Name="tbrClear" ToolTip="Clear">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/NewDocumentHS.BMP"></Image>
</Button>
<Separator />
<Button Name="tbrRed" ToolTip="Red">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/Color_fontHS.bmp"></Image>
</Button>
<Button Name="tbrBlue" ToolTip="Blue">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/Color_lineHS.bmp"></Image>
</Button>
<Separator/>
<Button Name="tbrUpperCase" ToolTip="Upper Case">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/FillUpHS.BMP"></Image>
</Button>
<Button Name="tbrLowerCase" ToolTip="Lower Case">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/FillDownHS.BMP"></Image>
</Button>
<Separator/>
<Button Name="tbrHelpAbout" ToolTip="About">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Annotations&Buttons/bmp_format/Help.BMP"></Image>
</Button>
</ToolBar>
<ToolBarTray Height="26" Name="ToolBarTray1" Width="200" />
</ToolBarPanel>
<StatusBar Height="23" Name="StatusBar1" VerticalAlignment="Bottom" Margin="0,0,1.5,0">
<StatusBarItem Name="sbiStatus">Ready</StatusBarItem>
</StatusBar>
<TextBox Margin="0,26,0,22" Name="txtEdit" VerticalScrollBarVisibility="Visible" AcceptsReturn="True" TextWrapping="Wrap" />
</Grid>
</Window>
程序编写完后，老师弹出一个感叹号窗口，信息如下：
未处理的“System.IO.IOException”类型的异常出现在 PresentationFramework.dll 中。
其他信息: 找不到资源“window1.xaml”。
代码我是照着书上敲的。连续几个小题目都是这个样子， 把我郁闷惨了，有谁知道如何解决吗？小弟菜鸟，才入门，不知道怎么办，急死我了。谢谢了。
另外我弄不上来截图，只有把代码拷贝上来了：
//TextEditor.xaml
<Window x:Class="Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Text Editor" Height="460" Width="600">
<Grid>
<ToolBarPanel Height="26" Name="ToolBarPanel1" VerticalAlignment="Top">
<ToolBar Height="26" Name="ToolBar1" Width="575">
<Button Name="tbrClear" ToolTip="Clear">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/NewDocumentHS.BMP"></Image>
</Button>
<Separator />
<Button Name="tbrRed" ToolTip="Red">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/Color_fontHS.bmp"></Image>
</Button>
<Button Name="tbrBlue" ToolTip="Blue">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/Color_lineHS.bmp"></Image>
</Button>
<Separator/>
<Button Name="tbrUpperCase" ToolTip="Upper Case">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/FillUpHS.BMP"></Image>
</Button>
<Button Name="tbrLowerCase" ToolTip="Lower Case">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Actions/32bitcolor bitmaps/16x16/FillDownHS.BMP"></Image>
</Button>
<Separator/>
<Button Name="tbrHelpAbout" ToolTip="About">
<Image Source="file:///E:/Program Files/Microsoft Visual Studio 9.0/Common7/VS2008ImageLibrary/2052/VS2008ImageLibrary/VS2008ImageLibrary/Annotations&Buttons/bmp_format/Help.BMP"></Image>
</Button>
</ToolBar>
<ToolBarTray Height="26" Name="ToolBarTray1" Width="200" />
</ToolBarPanel>
<StatusBar Height="23" Name="StatusBar1" VerticalAlignment="Bottom" Margin="0,0,1.5,0">
<StatusBarItem Name="sbiStatus">Ready</StatusBarItem>
</StatusBar>
<TextBox Margin="0,26,0,22" Name="txtEdit" VerticalScrollBarVisibility="Visible" AcceptsReturn="True" TextWrapping="Wrap" />
</Grid>
</Window>