How to read file amazon s3 bucket in C#?

public static void readFile()
        {
            TransferUtility fileTransferUtility = new TransferUtility(new AmazonS3Client(accessKey, secretKey, Amazon.RegionEndpoint.USEast1));

            BasicAWSCredentials basicCredentials = new BasicAWSCredentials(accessKey, secretKey);
            AmazonS3Client s3Client = new AmazonS3Client(new BasicAWSCredentials(accessKey, secretKey), Amazon.RegionEndpoint.USEast1);
            ListObjectsRequest request = new ListObjectsRequest();

            ListObjectsResponse response = s3Client.ListObjects(request.BucketName = bucketName, request.Prefix = csvFileName);

            foreach (S3Object obj in response.S3Objects)
            {
                try
                {
                    //string filename = directoryPath + "\\" + obj.Key;
                    //FileStream fs = File.Create(filename);
                    //fs.Close();
                    //Console.WriteLine("{0}", obj.Key);
                    fileTransferUtility.Download(csvFileName, bucketName, obj.Key);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message, ex.InnerException);
                }
            }
        }