Fusonic.Extensions.Aspire.Hosting 10.3.0

Prefix Reserved
.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package Fusonic.Extensions.Aspire.Hosting --version 10.3.0
                    


                    

                
NuGet\Install-Package Fusonic.Extensions.Aspire.Hosting -Version 10.3.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Fusonic.Extensions.Aspire.Hosting" Version="10.3.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Fusonic.Extensions.Aspire.Hosting" Version="10.3.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Fusonic.Extensions.Aspire.Hosting" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Fusonic.Extensions.Aspire.Hosting --version 10.3.0
                    


                    

                
#r "nuget: Fusonic.Extensions.Aspire.Hosting, 10.3.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Fusonic.Extensions.Aspire.Hosting@10.3.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Fusonic.Extensions.Aspire.Hosting&version=10.3.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Fusonic.Extensions.Aspire.Hosting&version=10.3.0
                    


                            Install as a Cake Tool

Aspire Hosting

Extensions for the Aspire AppHost. Tested with Aspire 13.6.

The extension methods are in the namespace Aspire.Hosting, like Aspire's own, so they are available in the AppHost without a using.

Compose stack

Aspire's containers show up in Docker Desktop as a flat list, mixed with everything else running on the machine. UseComposeStack labels them like Docker Compose does, so they are grouped as one stack:

var builder = DistributedApplication.CreateBuilder(args);
builder.UseComposeStack();      // stack "myapp" for MyApp.AppHost

var postgres = builder.AddPostgres("db")
   .WithPgAdmin()               // child resources are part of the stack, too
   .WithComposeService("postgres");   // optional: service name other than the resource name

builder.AddContainer("mailpit", "axllent/mailpit")
   .WithoutComposeStack();      // optional: leave a container out
  • The stack name defaults to the AppHost's name without .AppHost; pass one to override it: UseComposeStack("my-stack").
  • Names are normalized to what Compose allows: lowercase letters, digits, - and _.
  • Only in run mode; aspire publish and aspire deploy are not affected.
  • Changing the labels changes the configuration of a persistent container (ContainerLifetime.Persistent), so Aspire recreates it once. Its volumes stay.

Protected secrets

When a parameter is entered in the Aspire dashboard and saved, Aspire writes it to the AppHost's user secrets: a plaintext secrets.json in the user profile. UseProtectedSecrets keeps these values in the operating system's secret store for the current user instead:

var builder = DistributedApplication.CreateBuilder(args);
builder.UseProtectedSecrets();

var apiKey = builder.AddParameter("api-key", secret: true);   // entered in the dashboard as usual
  • Stored secrets are loaded over the user secrets, so a stale value in secrets.json doesn't win. Environment variables and command line arguments still do.
  • Aspire's deployment state (aspire publish/aspire deploy) stays in the user secrets.
  • Where no store is available (Linux without a keyring, e.g. headless or WSL), the AppHost logs a warning at startup and uses the plaintext user secrets as before.

Where the secrets are kept

OS Store
Windows File encrypted with DPAPI for the current user, in %LOCALAPPDATA%\Fusonic.Extensions.Aspire
macOS Keychain, service Fusonic.Extensions.Aspire
Linux Secret Service via libsecret (e.g. GNOME Keyring), schema Fusonic.Extensions.Aspire.secrets

The AppHost's secrets are identified by its UserSecretsId (or its name, if it has none). Both can be changed:

builder.UseProtectedSecrets(options =>
{
    options.Name = "my-app";
    options.Directory = "/some/where";   // the encrypted file on Windows
});

Uses the cache storage of Microsoft.Identity.Client.Extensions.Msal, the maintained cross-platform wrapper around these stores.

Limitations

  • Generated parameter defaults (e.g. a password Aspire generates for AddPostgres without one) are still saved to the plaintext user secrets: Aspire saves them through IDistributedApplicationBuilder.UserSecretsManager, which can't be replaced. Set such parameters explicitly (AddParameter(..., secret: true)) to keep them in the store.
  • Values already in secrets.json stay there. Remove them by hand (dotnet user-secrets remove <key>) after entering them again in the dashboard.
  • Builds on Aspire's experimental IUserSecretsManager (ASPIREUSERSECRETS001). A newer Aspire version may need a new version of this package.
Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
10.3.0 52 11/9/2026