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Editorial Team
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Asked: 2026-05-18T02:28:42+00:00

In the constructor of my WCF service class I am setting the current principal

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In the constructor of my WCF service class I am setting the current principal to be that of the principal passed in the header of the message:

Thread.CurrentPrincipal = OperationContext.Current.IncomingMessageHeaders.GetHeader<BBPrincipal>("bbPrincipal", "ns");

This seems to work fine, however when I come to reference the principal in a method, the Thread.CurrentPrincipal has reverted to a WindowsPrincipal.

Presumably the method is firing on a different thread. How can I ensure that the method is using the principal set in the constructor of the service?

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1 Answer

  1. Editorial Team

    I’ve just found the answer to my original question. In order to stop WCF overriding the principal with a blank one, set the following in the behavior configuration:

    <serviceAuthorization principalPermissionMode="None" />

    Simple as that and no need to made sweeping changes to the existing code base.

    See: http://connect.microsoft.com/VisualStudio/feedback/details/369445/wcf-service-configured-for-transport-security-shouldnt-change-thread-currentprincipal

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