How can I tell whether I am on x64 or x86 using .NET?

Question

I'd like to offer my users correct links to an upgraded version of my program based on what platform they're running on, so I need to know whether I'm currently running on an x86 OS or an x64 OS.

The best I've found is using Environment.GetEnvironmentVariable("PROCESSOR_ARCHITECTURE") , but I would think there would be some built-in facility for this?

Answer 1

环境.Is64BitOperatingSystem和Environment.Is64BitProcess正在.NET 4中引入。对于.NET 2，您需要尝试其他一些答案。

Answer 2

Call IsWow64Process to find out if your 32-bit process is running in WOW64 on a 64-bit operating system. You can call GetNativeSystemInfo to find out exactly what it is: the wProcessorArchitecture member of SYSTEM_INFO will be PROCESSOR_ARCHITECTURE_INTEL for 32-bit, PROCESSOR_ARCHITECTURE_AMD64 for x64 and PROCESSOR_ARCHITECTURE_IA64 for Intel's Itanium.

Answer 3

您可以通过C＃中使用的环境变量来确定很多- 如何在Windows 64位上获取程序文件（x86） [这恰好比迈克的答案更适合我，因为我碰巧有兴趣寻找Program Files目录名]

Answer 4

Check the size of IntPtr with Marshal.SizeOf. 32 bit = 4 bytes, 64 bit = 8 bytes.

Edit: I am not sure this is what you are looking for after reading the question again.

Answer 5

Check just IntPtr.Size . You need to have target platform as AnyCPU.

from here