How to Tell if a .NET Assembly Was Compiled as x86, x64 or Any CPU

Question

What\'s the easiest way to discover (without access to the source project) whether a .NET assembly DLL was compiled as \'x86\', \'x64\' or \'Any CPU\'?

Update: A com

Answer 1

If you just want to find this out on a given dll, then you can use the CorFlags tool that is part of the Windows SDK:

CorFlags.exe assembly.dll

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If you want to do it using code, take a look at the GetPEKind method of the Module class:

Assembly assembly = Assembly.LoadFrom("path to dll");
PortableExecutableKinds peKind;
ImageFileMachine imageFileMachine;
assembly.ManifestModule.GetPEKind(out peKind, out imageFileMachine)

You then need to examine the peKind to check its value. See the MSDN docs for PortableExecutableKinds for more info.