This is a PowerShell module for reading DLLs information.
It can be used to find out what's the build configuration, target CPU and more.
Module is available on Powershell Gallery
PS> Install-Module -Name DLLInfoPS> Import-Module DLLInfoPS> Get-BuildConfiguration "C:\dll\SiteMetadata.dll"
Release
PS> Get-TargetCPU "C:\dll\SiteMetadata.dll"
AnyCPU
PS> Get-JitOptimized "C:\dll\SiteMetadata.dll"
True