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Aspire Polyglot AppHost SDK Guide

Based on PR #13978 - Testing conducted on January 21, 2026

This guide documents the requirements and setup instructions for running Aspire AppHosts in Python, Go, Java, and Rust using the new polyglot SDK support.

Table of Contents

• Overview
• Prerequisites

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Console.WriteLine("Don't do that!!!");

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import * as http from 'http';
import { EventHubProducerClient, EventHubConsumerClient } from '@azure/event-hubs';
import { ServiceBusClient } from '@azure/service-bus';
import { CosmosClient } from '@azure/cosmos';
import { BlobServiceClient, ContainerClient } from '@azure/storage-blob';
import { QueueServiceClient, QueueClient } from '@azure/storage-queue';
import { TableServiceClient } from '@azure/data-tables';
import * as tedious from 'tedious';
import Redis from 'ioredis';
import { SearchIndexClient, AzureKeyCredential } from '@azure/search-documents';

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From d1449e14b396fa7b29f55ff7e1e1f4ebe8f69ad3 Mon Sep 17 00:00:00 2001
From: Sebastien Ros <sebastienros@gmail.com>
Date: Wed, 14 Aug 2024 11:09:27 -0700
Subject: [PATCH] Patch format files

---
 .editorconfig                                   | 6 ++++--
 .gitattributes                                  | 4 ----
 Directory.Packages.props                        | 1 +
 src/OrchardCore.Build/OrchardCore.Commons.props | 5 ++++-

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using NCalc.Domain;
using Parlot.Fluent;
using System;
using static Parlot.Fluent.Parsers;

namespace NCalc
{
    public class NCalcParser2
    {
        public static readonly Parser<LogicalExpression> Expression;

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using System.Collections.Generic;

public class MyCollection<T> : IEnumerable<T>
{
    private readonly List<T> _collection = new List<T>();
    
    public IEnumerator<T> GetEnumerator() => _collection.GetEnumerator();
    
    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
}

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PS C:\code\runtime> ./build.cmd libs -c Release -arch arm64 -os linux
  Determining projects to restore...
  Tool 'coverlet.console' (version '1.7.2') was restored. Available commands: coverlet
  Tool 'dotnet-reportgenerator-globaltool' (version '4.5.8') was restored. Available commands: reportgenerator
  Tool 'microsoft.dotnet.xharness.cli' (version '1.0.0-prerelease.21404.1') was restored. Available commands: xharness
  Tool 'microsoft.visualstudio.slngen.tool' (version '6.0.1') was restored. Available commands: slngen

  Restore was successful.
  All projects are up-to-date for restore.
  Determining projects to restore...

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using System;
using System.Collections.Generic;
using System.IO;
using System.Text.Json;

namespace testfs
{
    class Program
    {
        public static void Main(string[] args)

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imports:
  - https://raw.githubusercontent.com/dotnet/crank/master/src/Microsoft.Crank.Jobs.Bombardier/bombardier.yml
  - https://raw.githubusercontent.com/dotnet/crank/master/src/Microsoft.Crank.Jobs.Wrk/wrk.yml

jobs:
  sample:
    source:
      repository: https://github.com/SixLabors/ImageSharp.Web
      # branchOrCommit: master
      branchOrCommit: crank

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	Pipeline	Pipeline io_uring	Non-pipelined	Non-pipelined io_uring
CPU	99	50 (-50%)	97	48 (-50%)
RPS	2,592,670	2,878,222 (+11%)	497,429	631,976 (+26%)
Working set	79	81	79	81
Latency (mean)	1.28	0.98	1.07	1.47
Latency (99th)	n/a	7.57	14.8	14.67