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Just got the Visual Studio 11 developer preview installed. I see a new option in the project properties called "Prefer 32-bit" when compiling a managed (C#, VB) application with the AnyCPU target specified. This doesn't appear to be an option for class libraries, just top-level apps.
What does this flag indicate?
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Visual Studio 2022 is supported only on 64-bit editions of Windows 10 version 1909 and higher and Windows Server 2016 and higher.
Open your “Control Panel” and find the “System” option. On your screen, you'll see whether it is a 32-bit Operating System or 64-bit Operating System.
The x86 libraries are for 32-bit applications, and the x64 libraries are for 64-bit applications. You can see which platform you are targetting in Visual Studio's Configuration Manager.
Visual Studio's shift to 64-bit means your builds in Visual Studio 2022 will run in a 64-bit MSBuild. This will not cause any problems for most people. However, if your build includes a task that is 32-bit only and does not correctly mark itself as a 32-bit task, your build may fail.
It likely indicates the app is AnyCpu but when 32 bit is available it shouold run as such. This makes sense - 64 bit apps use more memory, and sometimes you just dont need the memory space ;)
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EDIT: Application compiled with "Any CPU 32-bit preferred" is compatible with x86, x64 and ARM, while x86 is compatible only with x86, x64 and not ARM. For details see this.
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