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In this exercise, you instantiate spatial data points and use the Spatial Results tab to view the points that you entered.

The TransactionScope class has, internally, a consistency bit. When first instantiated, this bit is set to false. If the TransactionScope object is disposed while this bit is false, the transaction is aborted or, more accurately, the transaction will inform the transaction coordinator that it is voting to abort the transaction. There should be some way to set the consistency bit to true. This is done by calling the Complete method on the TransactionScope object. This method has to be invoked before the object is disposed, and it can be invoked only once. If there is a second call for the same transaction, an InvalidOperationException will be raised. In general, it is a good idea for the call to Complete to be the last statement in the using block so that if an exception is thrown within the block, the call to Complete will be skipped. Keep in mind that calling Complete does not guarantee that the transaction will be committed. Although it is true that all attempts are made to complete the transaction, in a two-phase commit, any of the participating resource managers can vote to abort. As a result, it is possible that when the TransactionScope is being disposed, a transaction that you think will be committed is actually aborted. In such a situation, a TransactionAbortedException is raised from the Complete method. To address this, the following is an example of how TransactionScope should be used:

Correct Answers: B, C, and D A. Incorrect: If you disable the executive s account, he will be unable to access his private files located on the file server this afternoon. B. Correct: This would invalidate all certificates issued by the Enterprise CA, which would cause problems for everyone trying to log on.

Any time replication information from one server will traverse a network to reach another server, you risk the possibility of interception of that data. Just as DNS zone transfers are susceptible to this type of attack, so is WINS replication data. Because WINS servers may be exposed to the Internet just like DNS servers are, security should be of concern. Replication traffic between WINS servers across a public network such as the Internet can be intercepted. NetBIOS names and IP addresses of your servers and workstations can be made available to unauthorized personnel. As with DNS, there are a couple of options you can use to protect your WINS replication data:

*new Primary zone: microsoft.com Name Server (NS) updates original Secondary server widgets.microsoft.com

code block for an illustration.) This sample shows how to use the DropDownColorPicker control to change the Ribbon global colors. It demonstrates preview, cancel, and execute, as well as how to change the global Ribbon color, a subject that will be discussed shortly.

After this lesson, you will be able to:

' VB Counter.Count = Counter.Count + 1 ' or Counter.Count += 1 // C# Counter.Count++; // or Counter.Count += 1;

Although alerts can be useful, they are not perfect. The criteria are checked through polling. This means that thresholds can be momentarily crossed between polls without an alert being

Lesson Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19

11-6