When I make a call to GetPreSignedURL using the C# S3 SDK (version 3.7.204.1), I get an endpoint host of "bucket-name.s3.amazonaws.com" if the bucket exists in us-east-1. If I make the same call with the aws cli presign (version 2.13.14), I get the scheme "bucket-name.s3.region.amazonaws.com". The latter is what I want so that it is uniform across regions. How do I tell the SDK to include the region even if it's us-east-1 so that it matches the output of the AWS CLI? I've tried explicitly setting the RegionEndpoint when creating the S3Client as well as setting AWSConfigsS3.UseSignatureVersion4 = true; as suggested here.
(Yes, the signatures produced by sdk are valid, but for reasons I don't feel like going into, I have to be able to use both cli and sdk and have them give the same host for S3.)