GRPC error when use Register-OpenTelemetryForIIS

[staringnight]

Bug Report

Symptom

Describe the bug
Our web service in IIS have bugs when create gprc channel after integrate opentelemetry

.net framework is 4.72
grpc.core is 2.46.6
os is windows Server 2019

the integrate script is
`$module_url = "https://github.com/open-telemetry/opentelemetry-dotnet-instrumentation/releases/latest/download/OpenTelemetry.DotNet.Auto.psm1"
$download_path = Join-Path $env:temp "OpenTelemetry.DotNet.Auto.psm1"
Invoke-WebRequest -Uri $module_url -OutFile $download_path -UseBasicParsing

Import-Module $download_path

Install-OpenTelemetryCore

Register-OpenTelemetryForIIS`

this error is
Error loading native library. Not found in any of the possible locations: C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Grpc.Core\v4.0_2.0.0.0__d754f35622e28bad\grpc_csharp_ext.x86.dll,C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Grpc.Core\v4.0_2.0.0.0__d754f35622e28bad\runtimes/win-x86/native\grpc_csharp_ext.x86.dll,C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Grpc.Core\v4.0_2.0.0.0__d754f35622e28bad\../..\runtimes/win-x86/native\grpc_csharp_ext.x86.dll

Expected behavior
we need the web service grpc can work like before

[pjanotti]

Hi @staringnight - we don't have a repro for it, could you provide minimal steps to reproduce the issue? At first we don't add these to the GAC since they are native libraries.

It seems that your application has a direct reference to Grpc.Core, could you confirm is that is really the case? Are you referencing the Grpc.Core NuGet package from your app?

[staringnight]

Hi @pjanotti , Yes, our application has a direct reference to Grpc.Core, and it is a very old project. We find that the grpc_csharp_ext.x86.dll still in bin folder . So, why our service load dll at gac rather than bin, and when it can not load from gac , why not try to load at bin? is there any way to let it load grpc_csharp_ext.x86.dll from bin? or we copy the dll to the gac folder?