Amazon.S3.Util.AmazonS3Util.DoesS3BucketExist C# (CSharp) Method

        public static bool DoesS3BucketExist(IAmazonS3 s3Client, string bucketName)
        {
            if (s3Client == null)
            {
                throw new ArgumentNullException("s3Client", "The s3Client cannot be null!");
            }

            if (String.IsNullOrEmpty(bucketName))
            {
                throw new ArgumentNullException("bucketName", "The bucketName cannot be null or the empty string!");
            }

            var request = new GetPreSignedUrlRequest
            {
                BucketName = bucketName, 
                Expires = DateTime.Now.AddDays(1), 
                Verb = HttpVerb.HEAD, 
                Protocol = Protocol.HTTP
            };

            var url = s3Client.GetPreSignedURL(request);
            var uri = new Uri(url);

            var config = s3Client.Config;
            var response = AmazonS3HttpUtil.GetHead(s3Client, config, url, HeaderKeys.XAmzBucketRegion);
            if (response.StatusCode == null)
            {
                // there was a problem with the request and we weren't able
                // conclusively determine if the bucket exists
                return false;
            }
            else
            {
                AmazonS3Uri s3Uri;
                var mismatchDetected = AmazonS3Uri.TryParseAmazonS3Uri(uri, out s3Uri) &&
                            BucketRegionDetector.GetCorrectRegion(s3Uri, response.StatusCode.Value, response.HeaderValue) != null;
                var statusCodeAcceptable = response.StatusCode != HttpStatusCode.NotFound && response.StatusCode != HttpStatusCode.BadRequest;
                return statusCodeAcceptable || mismatchDetected;
            }
        }