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As you have seen already, the IIS 60 Manager displays application pools in a separate configuration node A default installation consists of one application pool called the DefaultAppPool This application pool runs as a network service, and every web application in the default website is configured to run in this application pool You may want to create additional application pools for other applications on a web server for several reasons: Stability problems: Maybe you want to run older applications with some stability problems in a separate application pool so that these problems don t affect other applications Memory leaks: A resource-intensive application or an old application with a memory leak is a good candidate for regular recycling In this case, you can create a separate pool and configure process recycling Applications running in other pools are not affected by these settings.

Visual Studio 2010 also provides a second utility to investigate the set of referenced assemblies within your current project. Activate the Object Browser using the View menu, and then select the assembly you wish to investigate (see Figure 2-15).

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Security: Security configuration might be another reason for encapsulating applications in separate pools For example, if you have web applications that require specific permissions (such as accessing only specific SQL Server databases or the Windows certificate store), you can create your own Windows user having the necessary permissions, configure a new application pool with this user, and then run web applications that require only these specific permissions in this pool All the other applications in other application pools still run under the low-privileged Network Service account Administration: In web hosting scenarios you can isolate administrative applications as well as applications for different customers (or groups of customers) through application pools; this way, web applications from one customer don t have access to resources such as databases or the file system of other customers applications because of the permissions for a configured application pool identity.

One major feature that ships with Visual Studio 2010 is support to refactor existing code. Simply put, refactoring is a formal and mechanical process whereby you improve an existing code base. In the bad old days, refactoring typically involved a ton of manual labor. Luckily, Visual Studio 2010 does a great deal to automate the refactoring process. Using the Refactor menu (which will only be available when a code file is active), related keyboard shortcuts, smart tags, and/or context-sensitive mouse clicks, you can dramatically reshape your code with minimal fuss and bother. Table 2-2 defines some common refactorings recognized by Visual Studio 2010.

As you can see, several useful scenarios exist for creating separate application pools for different applications or groups of applications Application pools (worker processes) provide you with a mechanism for isolating these applications based on different criteria such as security or reliability..

Allows you to define a new method based on a selection of code statements Turns a public field into a private field encapsulated by a C# property Defines a new interface type based on a set of existing type members Provide a way to reorder member arguments Remove a given argument from the current list of parameters (as you would expect) Allows you to rename a code token (method name, field, local variable, and so on) throughout a project

To illustrate refactoring in action, update your Main() method with the following simple code: static void Main(string[] args) { // Set up Console UI (CUI) Console.Title = "My Rocking App"; Console.ForegroundColor = ConsoleColor.Yellow; Console.BackgroundColor = ConsoleColor.Blue; Console.WriteLine("*************************************"); Console.WriteLine("***** Welcome to My Rocking App *****"); Console.WriteLine("*************************************"); Console.BackgroundColor = ConsoleColor.Black; // Wait for Enter key to be pressed. Console.ReadLine(); } While there is nothing wrong with the preceding code as it now stands, imagine that you want to display this welcome message at various places throughout your program. Rather than retyping the same exact console user interface logic, it would be ideal to have a helper function that could be called to do so. Given this, you will apply the Extract Method refactoring to your existing code. First, select each code statement within Main() (except the final call to Console.ReadLine()) using the editor. Then right-click the selected text and select the Extract Method option within the Refactor context menu (see Figure 2-16).

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