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Asked: 2026-05-10T18:12:02+00:00

I have a mixed UI (Win App, WPF App, and soon an ASP.NET MVC

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I have a mixed UI (Win App, WPF App, and soon an ASP.NET MVC App) setup, so far I’m using Client Application Services for security. I know how to programmatically get a user authenticated and doing so is working beautifully. However…

I want to implement some cross cutting that basically checks to see if the user is authenticated all the time. Since everything will be accessing web services I want to enable this as a standard execution for pretty much everything the UI does. So far I’m thinking the PIAB – Policy Injection Application Block – will serve that function. What I’m wondering is two things;

1 Will the PIAB cover that needed functionality? Verifying authentication at every practical step if used against the UI?

…and…

2 Are there alternatives out there besides the PIAB? I’m curious to do a comparison of aspect oriented policy injection frameworks.

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  1. I’m not really familiar with Client Application Services but from my experience, most AOP frameworks wrap interfaces in order to implement the cross-cutting functionality. If CAS uses interfaces, you could probably just wrap them with what ever functionality you require.

    Alternative AOP frameworks:

    Spring.NET and Dynamic proxy seem to work in much the same way and have much the same performance in my Hello World type tests (about half-way between direct calls and invoking through reflection). PIAB is significantly slower than both these frameworks and I found bit more verbose. It does have the ability to be configurable via xml and I’m not sure if that’s a good thing or not. Not sure if the other frameworks provide that. It does of course have the MS stamp of approval though :P.

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