What happened when I press F5 within Visual Studio to run Silverlight application?

You can find a fully described article from http://www.silverlightclub.com/resources/1858-silverlight-lets-start-building-applications.aspx.aspx
In the following step(s) I am giving the ideas all about:
1.Create a project:Here you just start your visual studio, Select your programming language [C#/VB], Choose Silverligh Template give the name and save it
2. Adding SIlverlight COntrols:One thing is happened here, controls cannot dragged onto the designer, you can draw/drag the controls on XAML page.
(a) Naming to control:In this step just give the name to your silverligt control like for Button you can give name as : btnmySilverligtButton
(b)Adding event handlers to Silverlight controls:Here you can give the event handlers like for click etc.
(c)Testing Silverlight applications in Visual Studio:Now just press F5 and test your application (More...)

Answer :: 1.Click on Start button
2 Go to programms
3. Go to vs 2008
4 .Open the file
New --> New Project
5. see left templates Then select Silverlight
6. Right display Silverlight applications
7. Your select Usercontrol OR Business applications
8. after click ok
9. Then display Silverlight Project (More...)

No. It's not possible. Web application project does not allow users to add app_code folder where website project does. (More...)

Web Site Project is deployed with source code to the server and all compilation takes place at runtime.

Web Application Projects, the code behind classes are compiled to dll. That dll is deployed and at runtime, the compiled code in the dll and the markup is combined to create a class which is used by the server to render output. (More...)

There is no hard and fast rule to start Silverlight application. Every developer can start as per his/her experience.
like as per my case I always prefer Visual Studio. SO, in my view Visual Studio is the best place to start with Silverlight2 applications.Microsoft provides
templates for creating Silverlight applications and libraries in C#
and Visual Basic. (More...)

Expression blend provide great extensibility for XAML files.To switch to Expression Blend, right-click on the XAML file and select Open in Expression Blend. (More...)

Yes, you can have multiple .xaml files in a single project.

In the App.xaml, in the method Application_Startup you can choose, which page you want to

initially display. (More...)

The designer will likely throw it away; most of the code inside InitializeComponent is auto-generated. (More...)

The vsvars32.bat sets the environment variables for Visual Studio. You can find it from %Microsoft Visual Studio 2008\Common7\Tools\vsvars32.bat.

When you start the Visual Studio 2008 command prompt it automatically runs vsvars32.bat. (More...)

Since for each .xap file we have to create a new silverlight application.
(More...)