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Editorial Team
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Asked: 2026-05-25T21:36:05+00:00

Do I need to implement my own locking in a WCF service that uses

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Do I need to implement my own locking in a WCF service that uses ConcurrencyMode.Multiple and InstanceContextMode.PerCall or InstanceContextMode.PerSession? Since a new ServiceContext object is created at every call or new session I should think that I would not, but I’m far from sure.

Example:

[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple, InstanceContextMode = InstanceContextMode.PerSession,
     IncludeExceptionDetailInFaults = false, MaxItemsInObjectGraph = Int32.MaxValue)]
public class ExampleService : IExample
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1 Answer

  1. Editorial Team

    No you don’t have to add locking. Each call will get a fresh instance.

    However, if you need state from a particular caller, that will have to be handled manually.

    See this thread for more information

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