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C# 4 and .NET 4

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s u m m a r y ❘ 1385<br />

object can be confi gured with the properties editor to defi ne transactional queues, journal queues, the type<br />

of the formatter, the base priority, <strong>and</strong> so on.<br />

Installers are discussed in Chapter 17, “Deployment.”<br />

summary<br />

In this chapter, you ’ ve seen how Message Queuing can be used. Message Queuing is an important<br />

technology that offers not only asynchronous, but also disconnected communication. The sender <strong>and</strong><br />

receiver can be running at different times, which makes Message Queuing an option for smart clients<br />

<strong>and</strong> also useful to distribute the load on the server over time.<br />

The most important classes with Message Queuing are Message <strong>and</strong> MessageQueue . The MessageQueue<br />

class allows sending, receiving, <strong>and</strong> peeking at messages, <strong>and</strong> the Message class defi nes the content that<br />

is sent.<br />

WCF offers an abstraction to Message Queuing. You can use the concepts offered by WCF to send messages<br />

by calling methods of a proxy <strong>and</strong> to receive messages by implementing a service.<br />

The next chapter dives into Directory Services, how <strong>and</strong> when to use these hierarchical data stores, <strong>and</strong><br />

different ways to connect to this service.<br />

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