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Since we ve started using .NET, our developers have been more productive than ever. Based on this productivity increase, we ve adjusted our priorities so that a full system rewrite will be done for our two flagship products, WinformsProduct and WebProduct. Since both products share the same business and data access layers currently, the same should be the case with the new products. We have a tremendous investment in our COM libraries and while we want full rewrites of each, we need to get out what we can as quickly as we can. Hence, we re going to rewrite our business and data access libraries one at a time. We still have some new feature requests that will be included in our existing applications but this shouldn t be a problem since we heard that COM components will be able to consume our .new .NET libraries.

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You can manage computer objects using many of the same skills presented in s 3 and 4. After selecting a computer object, you can, from the Action or shortcut menu:

As an Administrator, edit the attributes of the Machine.Config or Web.Config file on the processModel tag, as shown:

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As with most things, the more you do it, the better you get. The same is true for writing unit tests. As you create more and more, you start to see patterns, and best practices emerge. Your unit testing strategy should take into account these best practices. The following list describes some of the best practices that have been established for writing effective unit tests:

Answer the following questions for the developer: 1. Which data access technique should we use 2. How can I add business logic needed to ensure that each employee has only one request pending at a time

The best example of application domains in use is Internet Information Services (IIS) 5.0 s ASP.NET worker process, implemented by Aspnet_wp.exe. If 10 people visit an ASP.NET Web site simultaneously, ASP.NET will create a separate application domain for each user. Essentially, ASP.NET runs 10 separate instances of the assembly. Each instance of the assembly can store a property called userName without any concern that other instances will be able to access or overwrite the contents of the property. This same effect could be achieved by launching the same assembly in 10 separate processes, but switching between the processes would consume processor time, thus decreasing performance. Most of the time, you will rely on the existing run-time hosts to automatically create application domains for your assemblies. Examples of run-time hosts built into Microsoft Windows are ASP.NET, Internet Explorer (which creates a single application domain for all assemblies from a specific Web site), and the operating system. You can configure the behavior of these application domains by using friendly tools such as the Internet Information Services Manager and the .NET Framework Configuration tool. However, just as Aspnet_wp.exe creates application domains to isolate multiple instances of an assembly, you can create your own application domains to call assemblies with little risk that the assembly will take any action or access any resources that you have not specifically permitted. Figure 8-2 shows how an assembly can host application domains.

The folder at the top of the public folder subtree, also known as the IPM_Subtree. The root public folder is denoted by a backslash (\). Top-level public folders are children of the root public folder. A score assigned to an incoming message that indicates the likelihood that the message contains spam rather than legitimate communication.

Table 16-5

The compiled executable file that a service application project creates must be installed before the project can function in a meaningful way. You cannot debug or run a service application by pressing F5 or F11; you cannot immediately run a service or step into its code. Instead, you must install and start your service, and then attach a debugger to the service s process.

SSAS properties include nine Boolean properties that control whether a specific data mining algorithm is enabled or disabled. These properties are listed here:

' VB Dim info As DemoContextInfo = Nothing Dim hasSession As Boolean = (channel.SessionId IsNot Nothing) If hasSession Then instanceContext.IncomingChannels.Add(channel) info = channel.Extensions.Find(Of DemoContextInfo)() End If // C# DemoContextInfo info = null; bool hasSession = (channel.SessionId != null); if (hasSession) { instanceContext.IncomingChannels.Add(channel);

Table 8-4

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' VB Dim watcher As New FileSystemWatcher(Environment.SystemDirectory) // C# FileSystemWatcher watcher = new FileSystemWatcher(Environment.SystemDirectory);