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Asked: 2026-06-09T19:33:54+00:00

I’m using Visual Studio 2010 C#. I recently changed all projects in a solution

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I’m using Visual Studio 2010 C#.

I recently changed all projects in a solution to x64 by using configuration manager in addition to changing the build properties for all projects. Since then, the #if (DEBUG) directive doesn’t work as if the DEBUG constant vanished.

#if (DEBUG)
    // This code does not execute even in debug mode!
#endif

I also noticed that instead of the usual bin\Debug and bin\Release folders, the projects now get compiled into bin\x64\Debug and bin\x64\Release.

I searched around but most related results covered how to configure x64 if it does not show by default.

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1 Answer

  1. Editorial Team

    When creating your x64 platform, it’s likely your Debug settings for that platform aren’t defining the DEBUG constant.

    In the project’s Properties, go to your x64/Debug configuration/platform, and check the “Build” tab. There is a check box called: “Define DEBUG constant”. Make sure it’s checked.

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