System.Composition 10.0.0-rc.2.25502.107

About

Provides the Managed Extensibility Framework (MEF) 2.0, a lightweight, attribute-driven Dependency Injection (DI) container.

MEF simplifies the composition of applications by allowing components to be loosely coupled and dynamically discovered. This package supports the development of modular and maintainable applications by enabling parts to be composed at runtime.

Key Features

  • Components are discovered and composed using attributes.
  • Provides dependency injection capabilities for loosely coupled modules.

How to Use

Running code from a discovered component.

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

var configuration = new ContainerConfiguration().WithPart<Service>();

using var container = configuration.CreateContainer();

var service = container.GetExport<Service>();
service.Execute();
// Output: Service is running!

[Export]
public class Service
{
    public void Execute() => Console.WriteLine("Service is running!");
}

Main Types

The main types provided by this library are:

  • System.Composition.ExportAttribute
  • System.Composition.ImportAttribute
  • System.Composition.Convention.ConventionBuilder
  • System.Composition.Hosting.CompositionHost
  • System.Composition.CompositionContext
  • System.Composition.CompositionContextExtensions

Additional Documentation

Feedback & Contributing

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

Showing the top 20 packages that depend on System.Composition.

Packages Downloads
Microsoft.CodeAnalysis.CSharp.Features
.NET Compiler Platform ("Roslyn") support for creating C# editing experiences. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/2b7d172669b2f7e55803b55f317cfcc2d4279d76.
 83
Microsoft.CodeAnalysis.CSharp.Workspaces
.NET Compiler Platform ("Roslyn") support for analyzing C# projects and solutions. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/bf8791d0d1be92c24e56cefa52aa139e2b5340c2.
 97
Microsoft.CodeAnalysis.CSharp.Workspaces
.NET Compiler Platform ("Roslyn") support for analyzing C# projects and solutions. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/e482b6e281d7db727fcb086ebbfae44dcba82c6d.
 88
Microsoft.CodeAnalysis.CSharp.Workspaces
.NET Compiler Platform ("Roslyn") support for analyzing C# projects and solutions. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/e68227ea677b76a3c603bd616f03ea6d952b2458.
 91
Microsoft.CodeAnalysis.CSharp.Workspaces
.NET Compiler Platform ("Roslyn") support for analyzing C# projects and solutions. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/fa72fa61b0d822ea8a3fbeb96f668340419ab5cd.
 97
Microsoft.CodeAnalysis.Features
.NET Compiler Platform ("Roslyn") support for creating editing experiences. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/bf8791d0d1be92c24e56cefa52aa139e2b5340c2.
 80
Microsoft.CodeAnalysis.VisualBasic.Features
.NET Compiler Platform ("Roslyn") support for creating Visual Basic editing experiences. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/e68227ea677b76a3c603bd616f03ea6d952b2458.
 88
Microsoft.CodeAnalysis.VisualBasic.Workspaces
.NET Compiler Platform ("Roslyn") support for analyzing Visual Basic projects and solutions. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/bf8791d0d1be92c24e56cefa52aa139e2b5340c2.
 87
Microsoft.CodeAnalysis.VisualBasic.Workspaces
.NET Compiler Platform ("Roslyn") support for analyzing Visual Basic projects and solutions. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/e482b6e281d7db727fcb086ebbfae44dcba82c6d.
 97
Microsoft.CodeAnalysis.VisualBasic.Workspaces
.NET Compiler Platform ("Roslyn") support for analyzing Visual Basic projects and solutions. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/e68227ea677b76a3c603bd616f03ea6d952b2458.
 92
Microsoft.CodeAnalysis.VisualBasic.Workspaces
.NET Compiler Platform ("Roslyn") support for analyzing Visual Basic projects and solutions. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/fa72fa61b0d822ea8a3fbeb96f668340419ab5cd.
 91
Microsoft.CodeAnalysis.Workspaces.Common
A shared package used by the .NET Compiler Platform ("Roslyn") including support for analyzing projects and solutions. Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/1ce8866c9de4c2d67351ef6863699dee03b0804a.
 126
Microsoft.CodeAnalysis.Workspaces.Common
A shared package used by the .NET Compiler Platform ("Roslyn") including support for analyzing projects and solutions. Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/5f00f4d6ffb242a337e21a196aab0593891e430e.
 80
Microsoft.CodeAnalysis.Workspaces.Common
A shared package used by the .NET Compiler Platform ("Roslyn") including support for analyzing projects and solutions. Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/6a5a63bbc9f4449d9bd1e95a8f9624939c3ccdc3.
 131
Microsoft.CodeAnalysis.Workspaces.Common
A shared package used by the .NET Compiler Platform ("Roslyn") including support for analyzing projects and solutions. Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/81d9274600db701a8b08ed8af3fd6b00a775cc33.
 180
Microsoft.CodeAnalysis.Workspaces.Common
A shared package used by the .NET Compiler Platform ("Roslyn") including support for analyzing projects and solutions. Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/df45061e218c9b5813c5531bc06fb238a23e30f6.
 114
Microsoft.CodeAnalysis.Workspaces.Common
A shared package used by the .NET Compiler Platform ("Roslyn") including support for analyzing projects and solutions. Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/e091728607ca0fc9efca55ccfb3e59259c6b5a0a.
 230
Microsoft.CodeAnalysis.Workspaces.Common
A shared package used by the .NET Compiler Platform ("Roslyn") including support for analyzing projects and solutions. Do not install this package manually, it will be added as a prerequisite by other packages that require it. More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/e5eb71d6714749bccf91d9268ece78cd5d4d43ea.
 80
Microsoft.CodeAnalysis.Workspaces.MSBuild
.NET Compiler Platform ("Roslyn") support for analyzing MSBuild projects and solutions. This should be used with at least one of the following packages to add the appropriate language support: - Microsoft.CodeAnalysis.CSharp.Workspaces - Microsoft.CodeAnalysis.VisualBasic.Workspaces More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/e68227ea677b76a3c603bd616f03ea6d952b2458.
 91
Microsoft.CodeAnalysis.Workspaces.MSBuild
.NET Compiler Platform ("Roslyn") support for analyzing MSBuild projects and solutions. This should be used with at least one of the following packages to add the appropriate language support: - Microsoft.CodeAnalysis.CSharp.Workspaces - Microsoft.CodeAnalysis.VisualBasic.Workspaces More details at https://aka.ms/roslyn-packages This package was built from the source at https://github.com/dotnet/roslyn/commit/fa72fa61b0d822ea8a3fbeb96f668340419ab5cd.
 81

https://go.microsoft.com/fwlink/?LinkID=799421

.NET Framework 4.6.2

.NET Standard 2.0

.NET 10.0

.NET 9.0

.NET 8.0

Version Downloads Last updated
10.0.0-rc.2.25502.107 12 10/15/2025
10.0.0-rc.1.25451.107 25 09/10/2025
10.0.0-preview.7.25380.108 26 08/14/2025
10.0.0-preview.6.25358.103 24 07/17/2025
10.0.0-preview.5.25277.114 32 06/07/2025
10.0.0-preview.4.25258.110 34 05/16/2025
10.0.0-preview.3.25171.5 44 04/13/2025
10.0.0-preview.2.25163.2 40 04/01/2025
10.0.0-preview.1.25080.5 46 04/01/2025
9.0.10 7 10/15/2025
9.0.9 19 09/10/2025
9.0.8 23 08/05/2025
9.0.7 30 07/09/2025
9.0.6 28 06/12/2025
9.0.5 34 05/17/2025
9.0.4 41 04/10/2025
9.0.3 41 03/31/2025
9.0.2 45 03/31/2025
9.0.1 43 04/01/2025
9.0.0 44 11/14/2024
9.0.0-rc.2.24473.5 40 10/22/2024
9.0.0-rc.1.24431.7 40 09/19/2024
9.0.0-preview.7.24405.7 51 08/18/2024
9.0.0-preview.6.24327.7 56 07/18/2024
9.0.0-preview.5.24306.7 68 07/18/2024
9.0.0-preview.4.24266.19 54 07/18/2024
9.0.0-preview.3.24172.9 67 07/18/2024
9.0.0-preview.2.24128.5 61 07/18/2024
9.0.0-preview.1.24080.9 70 07/18/2024
8.0.0 64 07/18/2024
8.0.0-rc.2.23479.6 65 07/18/2024
8.0.0-rc.1.23419.4 63 07/18/2024
8.0.0-preview.7.23375.6 58 07/18/2024
8.0.0-preview.6.23329.7 61 07/18/2024
8.0.0-preview.5.23280.8 67 07/18/2024
8.0.0-preview.4.23259.5 60 07/18/2024
8.0.0-preview.3.23174.8 60 07/18/2024
8.0.0-preview.2.23128.3 76 07/18/2024
8.0.0-preview.1.23110.8 65 07/18/2024
7.0.0 341 02/05/2024
7.0.0-rc.2.22472.3 63 07/18/2024
7.0.0-rc.1.22426.10 66 07/18/2024
7.0.0-preview.7.22375.6 71 07/18/2024
7.0.0-preview.6.22324.4 62 07/18/2024
7.0.0-preview.5.22301.12 72 07/18/2024
7.0.0-preview.4.22229.4 66 07/18/2024
7.0.0-preview.3.22175.4 82 07/18/2024
7.0.0-preview.2.22152.2 70 07/18/2024
7.0.0-preview.1.22076.8 74 07/18/2024
6.0.2-mauipre.1.22102.15 42 01/10/2025
6.0.2-mauipre.1.22054.8 43 04/08/2025
6.0.0 174 02/04/2024
6.0.0-rc.2.21480.5 65 07/18/2024
6.0.0-rc.1.21451.13 68 07/18/2024
6.0.0-preview.7.21377.19 81 07/18/2024
6.0.0-preview.6.21352.12 60 07/18/2024
6.0.0-preview.5.21301.5 69 07/18/2024
6.0.0-preview.4.21253.7 65 07/18/2024
6.0.0-preview.3.21201.4 70 07/18/2024
6.0.0-preview.2.21154.6 65 07/18/2024
6.0.0-preview.1.21102.12 65 07/18/2024
5.0.1 78 07/18/2024
5.0.0 75 07/18/2024
5.0.0-rc.2.20475.5 68 07/18/2024
5.0.0-rc.1.20451.14 71 07/18/2024
5.0.0-preview.8.20407.11 74 07/18/2024
5.0.0-preview.7.20364.11 64 07/18/2024
5.0.0-preview.6.20305.6 65 07/18/2024
5.0.0-preview.5.20278.1 65 07/18/2024
5.0.0-preview.4.20251.6 59 07/18/2024
5.0.0-preview.3.20214.6 69 07/18/2024
5.0.0-preview.2.20160.6 74 07/18/2024
5.0.0-preview.1.20120.5 63 07/18/2024
1.4.1 74 07/18/2024
1.4.0 61 07/18/2024
1.4.0-preview3.19551.4 60 07/18/2024
1.4.0-preview2.19523.17 70 07/18/2024
1.4.0-preview1.19504.10 71 07/18/2024
1.3.0 71 07/18/2024
1.3.0-rc1.19456.4 58 07/18/2024
1.3.0-preview9.19421.4 61 07/18/2024
1.3.0-preview9.19416.11 61 07/18/2024
1.3.0-preview8.19405.3 70 07/18/2024
1.3.0-preview7.19362.9 64 07/18/2024
1.3.0-preview6.19303.8 70 07/18/2024
1.3.0-preview6.19264.9 62 07/18/2024
1.3.0-preview5.19224.8 68 07/18/2024
1.3.0-preview4.19212.13 73 07/18/2024
1.3.0-preview3.19128.7 66 07/18/2024
1.3.0-preview.19073.11 73 07/18/2024
1.3.0-preview.18571.3 64 07/18/2024
1.2.0 74 07/18/2024
1.2.0-rc1 74 07/18/2024
1.2.0-preview2-26406-04 66 07/18/2024
1.2.0-preview1-26216-02 67 07/18/2024
1.1.0 63 07/18/2024
1.1.0-preview2-25405-01 66 07/18/2024
1.1.0-preview1-25305-02 67 07/18/2024
1.0.31 94 02/04/2024
1.0.31-preview1-24530-04 64 07/18/2024