System.Composition.AttributedModel
9.0.0
Prefix Reserved
dotnet add package System.Composition.AttributedModel --version 9.0.0
NuGet\Install-Package System.Composition.AttributedModel -Version 9.0.0
<PackageReference Include="System.Composition.AttributedModel" Version="9.0.0" />
paket add System.Composition.AttributedModel --version 9.0.0
#r "nuget: System.Composition.AttributedModel, 9.0.0"
// Install System.Composition.AttributedModel as a Cake Addin #addin nuget:?package=System.Composition.AttributedModel&version=9.0.0 // Install System.Composition.AttributedModel as a Cake Tool #tool nuget:?package=System.Composition.AttributedModel&version=9.0.0
About
System.Composition.AttributedModel
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 provides the foundational attributes that allow you to declare parts for composition, such as imports, exports, and metadata. It is used to mark classes, properties, methods, and constructors for MEF's discovery and composition process.
Key Features
- Provides attributes for declaring composable parts, importing dependencies, metadata, and creating shared or non-shared parts
How to Use
Mark classes for export and import using attributes.
using System.Composition;
using System.Composition.Hosting;
var configuration = new ContainerConfiguration()
.WithPart<Service>()
.WithPart<Application>();
using CompositionHost container = configuration.CreateContainer();
Application app = container.GetExport<Application>();
app.Service.Execute();
// Service is running!
[Export]
public class Application
{
[Import]
public Service Service { get; set; }
}
[Export]
public class Service
{
public void Execute() => Console.WriteLine("Service is running!");
}
Metadata can be used to differentiate between multiple exports of the same contract.
using System.Composition;
using System.Composition.Hosting;
ContainerConfiguration configuration = new ContainerConfiguration()
.WithPart<FileLogger>()
.WithPart<ConsoleLogger>()
.WithPart<Application>();
using CompositionHost container = configuration.CreateContainer();
Application app = container.GetExport<Application>();
app.Run();
// Using FileLogger to log.
// FileLogger: Hello, World!
// Using ConsoleLogger to log.
// ConsoleLogger: Hello, World!
public interface ILogger
{
void Log(string message);
}
[Export(typeof(ILogger))]
[ExportMetadata("Name", "FileLogger")]
public class FileLogger : ILogger
{
public void Log(string message) => Console.WriteLine($"FileLogger: {message}");
}
[Export(typeof(ILogger))]
[ExportMetadata("Name", "ConsoleLogger")]
public class ConsoleLogger : ILogger
{
public void Log(string message) => Console.WriteLine($"ConsoleLogger: {message}");
}
[Export]
public class Application
{
[ImportMany]
public required IEnumerable<Lazy<ILogger, IDictionary<string, object>>> Loggers { get; set; }
public void Run()
{
foreach (var logger in Loggers)
{
var name = logger.Metadata["Name"];
Console.WriteLine($"Using {name} to log.");
logger.Value.Log("Hello, World!");
}
}
}
Main Types
The main types provided by this library are:
System.Composition.ExportAttribute
System.Composition.ImportAttribute
System.Composition.ExportMetadataAttribute
Additional Documentation
Related Packages
- System.Composition
- System.Composition.Convention
- System.Composition.Hosting
- System.Composition.Runtime
- System.Composition.TypedParts
Feedback & Contributing
System.Composition.AttributedModel is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.
Product | Versions 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. |
.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. |
-
.NETFramework 4.6.2
- No dependencies.
-
.NETStandard 2.0
- No dependencies.
-
net8.0
- No dependencies.
-
net9.0
- No dependencies.
NuGet packages (72)
Showing the top 5 NuGet packages that depend on System.Composition.AttributedModel:
Package | Downloads |
---|---|
System.Composition.TypedParts
Provides container configuration and some extension methods for the Managed Extensibility Framework (MEF). |
|
System.Composition.Convention
Provides types that support using Managed Extensibility Framework (MEF) with a convention-based configuration model. |
|
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.Composition
Lightning fast MEF engine, supporting System.ComponentModel.Composition and System.Composition. |
GitHub repositories (30)
Showing the top 5 popular GitHub repositories that depend on System.Composition.AttributedModel:
Repository | Stars |
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JustArchiNET/ArchiSteamFarm
C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.
|
|
neuecc/Utf8Json
Definitely Fastest and Zero Allocation JSON Serializer for C#(NET, .NET Core, Unity, Xamarin).
|
|
dotnet/ResXResourceManager
Manage localization of all ResX-Based resources in one central place.
|
|
security-code-scan/security-code-scan
Vulnerability Patterns Detector for C# and VB.NET
|
|
icsharpcode/RefactoringEssentials
Refactoring Essentials for Visual Studio
|