```

string accessKey = "minioadmin";

            string secretKey = "minioadmin";

            string endpoint = "http://127.0.0.1:9000";

            string bucketName = "bucket01";

            AWSCredentials credentials = new BasicAWSCredentials(accessKey,secretKey);

            AmazonS3Config clientConfig = new AmazonS3Config()

            {

                ServiceURL = endpoint,

                UseHttp = true,

                SignatureVersion = "2",

                ForcePathStyle = true,

                SignatureMethod = SigningAlgorithm.HmacSHA1

            };

            AmazonS3Client s3Client = new AmazonS3Client(credentials, clientConfig);

            List<S3Bucket> buckets = s3Client.ListBuckets().Buckets;

            if (buckets.Count == 0)

            {

                PutBucketRequest req = new PutBucketRequest();

                req.BucketName = bucketName;

                req.UseClientRegion = true;

                req.BucketRegionName = "";

                s3Client.PutBucket(bucketName);

            }

            foreach (S3Bucket b in buckets)

            {

                Console.WriteLine(b.BucketName);

            }

            string key = "1.png";

            PutObjectRequest request = new PutObjectRequest()

            {

                BucketName = bucketName,

                Key = "1.png",

                FilePath = @"D:\1.png"

            };

            s3Client.PutObject(request);

            DateTime expire = new DateTime(2100, 1, 1, 0, 0, 0, 0);

            GetPreSignedUrlRequest r = new GetPreSignedUrlRequest()

            {

                Expires = expire,

                BucketName = bucketName,

                Key = key,

                Protocol = Protocol.HTTP

            };

            string preSignedUrl = s3Client.GetPreSignedURL(r);

            Console.WriteLine(preSignedUrl);

```