What version of gRPC and what language are you using?

C# / net461
gRPC 1.19.0

What operating system (Linux, Windows,...) and version?

Windows Server 2008 R2 64bit

What did you do?

• Added Google.Cloud.Logging.V2 to fresh c# project.
• Added gRPC 1.19.0 to c# project.
• Added single logging call to trigger gRPC call to server in console application.
• Published project: dotnet publish -c release r win-x64
• Ran on Windows Server 2008 R2 64bit

What did you expect to see?

Successful gRPC call to GCL.

What did you see instead?

c# Logging gRPC call failed with "DNS resolution failure". Note this error also occurs for other GCP gRPC apis (metrics for eg.)

Anything else we should know about your project / environment?

The same program ran fine on Windows 10 and Windows Server 2012 R2.
Downgrading to gRPC nuget 1.18.0 resolves the issue.
Other gRPC calls were successful on same server using gRPC 1.19.0 with IP addresses for server references.