C# WPF

Question

Hi, I'm new to WPF and have a question which quite same with the article: "Walkthrough: Debug a WPF window or Windows Form without running your application". 

The link: http://blogs.msdn.com/b/habibh/archive/2009/07/17/walkthrough-debug-a-wpf-window-or-windows-form-without-running-your-application-video.aspx

I will take the picture as an example:

http://blogs.msdn.com/blogfiles/habibh/WindowsLiveWriter/DebugaWPFwindoworWindowsFormwithoutrunni_FD38/image_3.png

From the picture, the project have 4 WPF windows such as:

1. App.xaml

2. Create...so on.xaml

3. MainWindows.xaml

4. ViewChart... so on.xaml

When every time in VS 2010, I click on the starting debugging (F5) or start without debugging(Ctrl + F5) will always run the MainWindows.xaml. What the reason coz this? Is this because of in the App.xaml that we declare StartupUri="MainWindow.xaml".

Can I run the particular WPF windows such number 4. ViewChart... so on.xaml instead of the whole application(*Such as the MainWindows.xaml)?

Reply is gracefully welcome~~ 

(*I will like to declare that the picture is not my original work instead of other people~~)