.NET Quickstart Guide

Connect a .NET application to SILO with the MinIO .NET SDK.

MinIO SDK for .NET

SILO implements the S3-compatible server contract, so applications can use the upstream MinIO .NET SDK without a SILO-specific client fork. This guide uses the stable NuGet package and environment variables for credentials.

SDK release requirements and APIs can change independently of SILO. Check the current NuGet package and SDK releases before choosing a version for your application.

Install the package

From an existing .NET project, add the Minio package:

BASH

dotnet add package Minio

Configure the connection

Set the endpoint and credentials for your SILO deployment. Keep secrets outside source control.

BASH

export S3_ENDPOINT=127.0.0.1:9000
export S3_ACCESS_KEY=silo-admin
export S3_SECRET_KEY=replace-with-a-strong-secret
export S3_USE_SSL=false

S3_ENDPOINT is a host and optional port, without an http:// or https:// prefix. Set S3_USE_SSL=true when the endpoint serves TLS.

Create a bucket and upload an object

CSHARP

using Minio;
using Minio.DataModel.Args;

var endpoint = Environment.GetEnvironmentVariable("S3_ENDPOINT")
    ?? throw new InvalidOperationException("S3_ENDPOINT is required");
var accessKey = Environment.GetEnvironmentVariable("S3_ACCESS_KEY")
    ?? throw new InvalidOperationException("S3_ACCESS_KEY is required");
var secretKey = Environment.GetEnvironmentVariable("S3_SECRET_KEY")
    ?? throw new InvalidOperationException("S3_SECRET_KEY is required");
var useSsl = bool.TryParse(Environment.GetEnvironmentVariable("S3_USE_SSL"), out var ssl)
    && ssl;

var client = new MinioClient()
    .WithEndpoint(endpoint)
    .WithCredentials(accessKey, secretKey)
    .WithSSL(useSsl)
    .Build();

const string bucket = "dotnet-quickstart";
const string objectName = "hello.txt";
const string filePath = "hello.txt";

var exists = await client.BucketExistsAsync(
    new BucketExistsArgs().WithBucket(bucket));

if (!exists)
{
    await client.MakeBucketAsync(
        new MakeBucketArgs().WithBucket(bucket));
}

await client.PutObjectAsync(
    new PutObjectArgs()
        .WithBucket(bucket)
        .WithObject(objectName)
        .WithFileName(filePath)
        .WithContentType("text/plain"));

Console.WriteLine($"Uploaded {objectName} to {bucket}");

Create hello.txt, then run the project:

BASH

dotnet run

For ASP.NET Core dependency injection and additional operations, use the SDK’s current README. The maintained repository also contains simple and host-based example projects; review their target branch and package version before copying code into a pinned application.

Production checklist

Use TLS and verify the server certificate.
Load credentials from a secret manager or protected environment, not source code.
Grant the application only the bucket and object permissions it needs.
Pin and test the SDK version as part of the application’s dependency lifecycle.
Handle SDK exceptions, request cancellation, retries, and multipart-upload cleanup explicitly.

See Identity and Access Management for server-side policy configuration.