MinIO Client SDK for .NET Slack Build status

MinIO Client SDK provides higher level APIs for MinIO and Amazon S3 compatible cloud storage services.For a complete list of APIs and examples, please take a look at the Dotnet Client API Reference.This document assumes that you have a working VisualStudio development environment.

Minimum Requirements

Install from NuGet

To install MinIO .NET package, run the following command in Nuget Package Manager Console.

PM> Install-Package Minio

MinIO Client Example

To connect to an Amazon S3 compatible cloud storage service, you will need to specify the following parameters.

Parameter Description
endpoint URL to object storage service.
accessKey Access key is the user ID that uniquely identifies your account.
secretKey Secret key is the password to your account.
secure Enable/Disable HTTPS support.

The following examples uses a freely hosted public MinIO service '' for development purposes.

using Minio;

// Initialize the client with access credentials.
private static MinioClient minio = new MinioClient("",

// Create an async task for listing buckets.
var getListBucketsTask = minio.ListBucketsAsync();

// Iterate over the list of buckets.
foreach (Bucket bucket in getListBucketsTask.Result.Buckets)
    Console.WriteLine(bucket.Name + " " + bucket.CreationDateDateTime);

Complete File Uploader Example

This example program connects to an object storage server, creates a bucket and uploads a file to the bucket.
To run the following example, click on [Link] and start the project

using System;
using Minio;
using Minio.Exceptions;
using Minio.DataModel;
using System.Threading.Tasks;

namespace FileUploader
    class FileUpload
        static void Main(string[] args)
            var endpoint  = "";
            var accessKey = "Q3AM3UQ867SPQQA43P2F";
            var secretKey = "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG";
                var minio = new MinioClient(endpoint, accessKey, secretKey).WithSSL();
            catch (Exception ex)

        // File uploader task.
        private async static Task Run(MinioClient minio)
            var bucketName = "mymusic";
            var location   = "us-east-1";
            var objectName = "";
            var filePath = "C:\\Users\\username\\Downloads\\golden_oldies.mp3";
            var contentType = "application/zip";

                // Make a bucket on the server, if not already present.
                bool found = await minio.BucketExistsAsync(bucketName);
                if (!found)
                    await minio.MakeBucketAsync(bucketName, location);
                // Upload a file to bucket.
                await minio.PutObjectAsync(bucketName, objectName, filePath, contentType);
                Console.WriteLine("Successfully uploaded " + objectName );
            catch (MinioException e)
                Console.WriteLine("File Upload Error: {0}", e.Message);

Running MinIO Client Examples

On Windows

  //Cases.MakeBucket.Run(minioClient, bucketName).Wait();
Setting up Mono and .NETCore on Linux
NOTE: minio-dotnet requires mono 5.0.1 stable release and .NET Core 2.0 SDK to build on Linux.
$ ./
Running Minio.Examples
$ git clone && cd minio-dotnet
  //Cases.MakeBucket.Run(minioClient, bucketName).Wait();
$ cd Minio.Examples
$ dotnet build -c Release
$ dotnet run

Bucket Operations

Bucket policy Operations

Bucket notification Operations

File Object Operations

Object Operations

Presigned Operations

Client Custom Settings

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