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Asked: 2026-05-27T22:12:15+00:00

According to all the MSDN docs I can find, to disable Concurrent GC, you

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According to all the MSDN docs I can find, to disable Concurrent GC, you add this to your application config:

<runtime>
    <gcConcurrent enabled="false"/>
</runtime>

However, I have a .NET 4 ASP.NET app that I am running though VS2010 using Cassini (ASP.NET Development Server). Whether I specify enabled="true" or enabled="false" either way, making a call to GC.RegisterForFullGCNotification() throws the exception:

This API is not available when the concurrent GC is enabled.

I have tried it running with and without debug, and everything fails the same way.
Any ideas how to make this work?

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1 Answer

  1. Editorial Team

    I recommend you use IIS Express, it’s free and a much more capable web server than Cassini.

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