System.Composition.Convention 9.0.13

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6.2 This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package System.Composition.Convention --version 9.0.13
                    


                    

                
NuGet\Install-Package System.Composition.Convention -Version 9.0.13
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="System.Composition.Convention" Version="9.0.13" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="System.Composition.Convention" Version="9.0.13" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="System.Composition.Convention" />
                    


                            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 System.Composition.Convention --version 9.0.13
                    


                    

                
#r "nuget: System.Composition.Convention, 9.0.13"
#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 System.Composition.Convention@9.0.13
#: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=System.Composition.Convention&version=9.0.13
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=System.Composition.Convention&version=9.0.13
                    


                            Install as a Cake Tool

About

System.Composition.Convention is part of the Managed Extensibility Framework (MEF) 2.0, a composition library for .NET that enables dependency injection through attributes or conventions.

This package simplifies the process of applying consistent patterns for part exports, imports, and metadata by using convention-based configurations. It is useful for scenarios where you want to avoid repetitive attribute-based decoration and instead define conventions for registering types in your composition container.

Key Features

  • Configure exports, imports, and metadata for parts using conventions rather than attributes.
  • Allows defining conventions through a fluent API, making configuration more flexible and readable.

How to Use

Configure parts for composition without using attributes.

using System.Composition.Convention;
using System.Composition.Hosting;

var conventions = new ConventionBuilder();

// Apply conventions: any class that implements ILogger will be exported as ILogger
conventions
    .ForTypesDerivedFrom<ILogger>()
    .Export<ILogger>();

var configuration = new ContainerConfiguration()
    .WithPart<FileLogger>(conventions)
    .WithPart<ConsoleLogger>(conventions);

using CompositionHost container = configuration.CreateContainer();
    
var loggers = container.GetExports<ILogger>();

foreach (var logger in loggers)
{
    logger.Log("Hello, World!");
}
// FileLogger: Hello, World!
// ConsoleLogger: Hello, World!

public interface ILogger
{
    void Log(string message);
}

public class FileLogger : ILogger
{
    public void Log(string message) => Console.WriteLine($"FileLogger: {message}");
}

public class ConsoleLogger : ILogger
{
    public void Log(string message) => Console.WriteLine($"ConsoleLogger: {message}");
}

Main Types

The main types provided by this library are:

  • System.Composition.Convention.ConventionBuilder
  • System.Composition.Convention.PartConventionBuilder
  • System.Composition.Convention.ParameterImportConventionBuilder

Additional Documentation

Feedback & Contributing

System.Composition.Convention is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  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. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (36)

Showing the top 5 NuGet packages that depend on System.Composition.Convention:

Package Downloads
System.Composition

Provides a version of the Managed Extensibility Framework (MEF) that is lightweight and specifically optimized for high throughput scenarios, such as the web.
Microsoft.VisualStudio.Utilities

A member of the Visual Studio SDK
Microsoft.VisualStudio.Shell.Framework

A member of the Visual Studio SDK
Microsoft.VisualStudio.Shell.15.0

A member of the Visual Studio SDK
Microsoft.VisualStudio.Imaging

A member of the Visual Studio SDK

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on System.Composition.Convention:

Repository Stars
dotnet/roslyn
The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.
Version Downloads Last Updated
11.0.0-preview.1.26104.118 53 2/10/2026
10.0.3 5,598 2/10/2026
10.0.2 52,710 1/13/2026
10.0.1 83,937 12/9/2025
10.0.0 45,972 11/11/2025
10.0.0-rc.2.25502.107 1,039 10/14/2025
10.0.0-rc.1.25451.107 891 9/9/2025
10.0.0-preview.7.25380.108 469 8/12/2025
10.0.0-preview.6.25358.103 461 7/15/2025
10.0.0-preview.5.25277.114 598 6/6/2025
10.0.0-preview.4.25258.110 631 5/12/2025
9.0.13 247 2/10/2026
9.0.12 2,294 1/13/2026
9.0.11 12,032 11/11/2025
9.0.10 88,951 10/14/2025
9.0.9 98,749 9/9/2025
9.0.8 57,193 8/4/2025
9.0.7 45,557 7/8/2025
9.0.6 155,367 6/10/2025
9.0.5 61,877 5/13/2025
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