This section describes what a Windows Communication Foundation (WCF) reliable session is, what it is used for, how and when to use one, what binding configurations support it, and pointers on best practices. The following table summarizes details about the essential points and related topics in this section.

The reliable session WCF provides ensures that messages sent between endpoints are transferred across SOAP or transport intermediaries and are delivered only once and, optionally, in the same order in which they were sent.

To use a reliable session with a WCF application, either use one of the system-provided bindings in WCF that support a reliable session by default or as an option, or create your own custom binding that supports the session.

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