How to load an assembly as reflection-only in a new AppDomain?

Question

I\'m experienced in C# but relatively unfamiliar with the concepts of AppDomain and the like. Anyway, I\'m trying to get an assembly to load in a reflection-onl

Answer 1

I got the same exception when loading multiple assemblies for different target frameworks, but with the same identity. My workaround was to do the assembly load in a separate .ps1, and call it via CMD /C, which creates a new AppDomain for each script call, thereby avoiding the exception.

Parent *.ps1:

& CMD /C powershell.exe -NoProfile -ExecutionPolicy Bypass -File "$PsScriptRoot\check-assembly.ps1" "net461\MyAssembly.dll"
# Check exit code...
& CMD /C powershell.exe -NoProfile -ExecutionPolicy Bypass -File "$PsScriptRoot\check-assembly.ps1" "netcoreapp3.1\MyAssembly.dll"
# Check exit code...

check-assembly.ps1:

Param(
    [Parameter(Mandatory, HelpMessage="DLL file to check: ")] 
    [string]$dllFile
)

$ass = [System.Reflection.Assembly]::LoadFrom("$dllFile")
# Check $ass

Answer 2

I think I've got it:

function Load-AssemblyInNewAppDomain($assembly)
{
    $domain = [AppDomain]::CreateDomain("foo")
    $domain.DoCallback
    ({
        $loaded = [Reflection.Assembly]::Load($assembly)
    })
}