Targeted architecture of .NET assembly using Mono.Cecil

Question

Can I find whether a .NET assembly has been specifically build for 32 or 64 bits using Mono.Cecil? Or any other way of finding out without having to load the assembly first.

Answer 1

Using mono-ceci, you can do this (the information is available module by module):

AssemblyDefinition asm = AssemblyFactory.GetAssembly("myassembly.dll");

foreach (ModuleDefinition module in asm.Modules)
{
    Console.WriteLine("Module " + module.Name);
    Console.WriteLine("IsPE64 " + module.Image.PEOptionalHeader.StandardFields.IsPE64);
}

Answer 2

moduleDefinition.Architecture is of type TargetArchitecture witch is defined as:

public enum TargetArchitecture {
    I386,
    AMD64,
    IA64,
    ARMv7,
}

There is another property, moduleDefinition.Attributes of type ModuleAttributes:

[Flags]
public enum ModuleAttributes {
    ILOnly = 1,
    Required32Bit = 2,
    StrongNameSigned = 8,
    Preferred32Bit = 0x00020000,
}