Question

What are the different instance modes in WCF?

Answer 1

To a particular service instance WCF binds an incoming message request, so the available modes are

• Per Call: This instance is created for each call, efficient in terms of memory but need to maintain session
• Per Session: For a complete session of a user instance are created
• Single: One instance is created which is shared among all the users and shared among all.  In terms of memory it is least efficient.