In order to enable a custom management of a WCF session, the service contracts have to be decorated with the following attribute: [ServiceBehavior(AutomaticSessionShutdown=false)]. By default the session will be terminated when the WCF call is completed. When a session is established between a WCF service and a client, all client calls are handled by same WCF instance. WCF supports the following types of sessions behaviors:
- System.ServiceModel.Channels.SecurityBindingElement (supports security based sessions)
- System.ServiceModel.NetTcpBinding (supports TCP/IP sessions)
- System.ServiceModel.Channels.ReliableSessionBindingElement (supports reliable sessions)
- System.ServiceModel.NetMsmqBinding (supposrts MSMQ datagram sessions)

BasicHttpBinding defines a binding used by WCF to configure and expose endpoints which provide compatibility with ASMX based services and clients, or to any other type of services which comply with WS-I Basic Profile 1.1. It makes use of HTTP transport protocol to deliver SOAP 1.1 messages. BasicHttpContextBinding provides same functionality as BasicHttpBinding but with some extras. It ensures that the WCF service exposed through this endpoint biding is compatible with ASP.NET session state features.