Microsoft.Extensions.Logging.Abstractions 8.0.0

The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org. Prefix Reserved
There is a newer prerelease version of this package available.
See the version list below for details.
dotnet add package Microsoft.Extensions.Logging.Abstractions --version 8.0.0
NuGet\Install-Package Microsoft.Extensions.Logging.Abstractions -Version 8.0.0
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="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Microsoft.Extensions.Logging.Abstractions --version 8.0.0
#r "nuget: Microsoft.Extensions.Logging.Abstractions, 8.0.0"
#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.
// Install Microsoft.Extensions.Logging.Abstractions as a Cake Addin
#addin nuget:?package=Microsoft.Extensions.Logging.Abstractions&version=8.0.0

// Install Microsoft.Extensions.Logging.Abstractions as a Cake Tool
#tool nuget:?package=Microsoft.Extensions.Logging.Abstractions&version=8.0.0

About

Microsoft.Extensions.Logging.Abstractions provides abstractions of logging. Interfaces defined in this package are implemented by classes in Microsoft.Extensions.Logging and other logging packages.

This package includes a logging source generator that produces highly efficient and optimized code for logging message methods.

Key Features

  • Define main logging abstraction interfaces like ILogger, ILoggerFactory, ILoggerProvider, etc.

How to Use

Custom logger provider implementation example
using Microsoft.Extensions.Logging;

public sealed class ColorConsoleLogger : ILogger
{
    private readonly string _name;
    private readonly Func<ColorConsoleLoggerConfiguration> _getCurrentConfig;

    public ColorConsoleLogger(
        string name,
        Func<ColorConsoleLoggerConfiguration> getCurrentConfig) =>
        (_name, _getCurrentConfig) = (name, getCurrentConfig);

    public IDisposable? BeginScope<TState>(TState state) where TState : notnull => default!;

    public bool IsEnabled(LogLevel logLevel) =>
        _getCurrentConfig().LogLevelToColorMap.ContainsKey(logLevel);

    public void Log<TState>(
        LogLevel logLevel,
        EventId eventId,
        TState state,
        Exception? exception,
        Func<TState, Exception?, string> formatter)
    {
        if (!IsEnabled(logLevel))
        {
            return;
        }

        ColorConsoleLoggerConfiguration config = _getCurrentConfig();
        if (config.EventId == 0 || config.EventId == eventId.Id)
        {
            ConsoleColor originalColor = Console.ForegroundColor;

            Console.ForegroundColor = config.LogLevelToColorMap[logLevel];
            Console.WriteLine($"[{eventId.Id,2}: {logLevel,-12}]");

            Console.ForegroundColor = originalColor;
            Console.Write($"     {_name} - ");

            Console.ForegroundColor = config.LogLevelToColorMap[logLevel];
            Console.Write($"{formatter(state, exception)}");

            Console.ForegroundColor = originalColor;
            Console.WriteLine();
        }
    }
}

Create logs

// Worker class that uses logger implementation of teh interface ILogger<T>

public sealed class Worker : BackgroundService
{
    private readonly ILogger<Worker> _logger;

    public Worker(ILogger<Worker> logger) =>
        _logger = logger;

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        while (!stoppingToken.IsCancellationRequested)
        {
            _logger.LogInformation("Worker running at: {time}", DateTimeOffset.UtcNow);
            await Task.Delay(1_000, stoppingToken);
        }
    }
}

Use source generator
public static partial class Log
{
    [LoggerMessage(
        EventId = 0,
        Level = LogLevel.Critical,
        Message = "Could not open socket to `{hostName}`")]
    public static partial void CouldNotOpenSocket(this ILogger logger, string hostName);
}

public partial class InstanceLoggingExample
{
    private readonly ILogger _logger;

    public InstanceLoggingExample(ILogger logger)
    {
        _logger = logger;
    }

    [LoggerMessage(
        EventId = 0,
        Level = LogLevel.Critical,
        Message = "Could not open socket to `{hostName}`")]
    public partial void CouldNotOpenSocket(string hostName);
}

Main Types

The main types provided by this library are:

  • Microsoft.Extensions.Logging.ILogger
  • Microsoft.Extensions.Logging.ILoggerProvider
  • Microsoft.Extensions.Logging.ILoggerFactory
  • Microsoft.Extensions.Logging.ILogger<TCategoryName>
  • Microsoft.Extensions.Logging.LogLevel
  • Microsoft.Extensions.Logging.Logger<T>
  • Microsoft.Extensions.Logging.LoggerMessage
  • Microsoft.Extensions.Logging.Abstractions.NullLogger

Additional Documentation

Microsoft.Extensions.Logging Microsoft.Extensions.Logging.Console Microsoft.Extensions.Logging.Debug Microsoft.Extensions.Logging.EventSource Microsoft.Extensions.Logging.EventLog Microsoft.Extensions.Logging.TraceSource

Feedback & Contributing

Microsoft.Extensions.Logging.Abstractions 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 is compatible.  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 is compatible.  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. 
.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 (7.8K)

Showing the top 5 NuGet packages that depend on Microsoft.Extensions.Logging.Abstractions:

Package Downloads
Microsoft.Extensions.Logging The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

Logging infrastructure default implementation for Microsoft.Extensions.Logging.

Microsoft.Extensions.Hosting.Abstractions The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

Hosting and startup abstractions for applications.

Microsoft.Extensions.Caching.Memory The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

In-memory cache implementation of Microsoft.Extensions.Caching.Memory.IMemoryCache.

Microsoft.Extensions.Logging.Configuration The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

Configuration support for Microsoft.Extensions.Logging.

Microsoft.AspNetCore.Authorization The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

ASP.NET Core authorization classes. Commonly used types: Microsoft.AspNetCore.Authorization.AllowAnonymousAttribute Microsoft.AspNetCore.Authorization.AuthorizeAttribute This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/b1beadfe0ad3d02eb5207681a5328793c4b3822c

GitHub repositories (552)

Showing the top 5 popular GitHub repositories that depend on Microsoft.Extensions.Logging.Abstractions:

Repository Stars
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9.0.0-preview.1.24080.9 36,700 2/13/2024
8.0.0 24,029,328 11/14/2023
8.0.0-rc.2.23479.6 890,452 10/10/2023
8.0.0-rc.1.23419.4 635,483 9/12/2023
8.0.0-preview.7.23375.6 312,934 8/8/2023
8.0.0-preview.6.23329.7 273,286 7/11/2023
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7.0.1 37,070,909 6/13/2023
7.0.0 158,369,053 11/7/2022
7.0.0-rc.2.22472.3 501,096 10/11/2022
7.0.0-rc.1.22426.10 378,412 9/14/2022
7.0.0-preview.7.22375.6 355,587 8/9/2022
7.0.0-preview.6.22324.4 197,337 7/12/2022
7.0.0-preview.5.22301.12 156,975 6/14/2022
7.0.0-preview.4.22229.4 370,815 5/10/2022
7.0.0-preview.3.22175.4 166,032 4/13/2022
7.0.0-preview.2.22152.2 212,676 3/14/2022
7.0.0-preview.1.22076.8 152,333 2/17/2022
6.0.4 15,924,326 6/13/2023
6.0.3 34,908,883 11/7/2022
6.0.2 33,421,438 9/13/2022
6.0.2-mauipre.1.22102.15 133,247 2/15/2022
6.0.2-mauipre.1.22054.8 229,120 1/19/2022
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6.0.0-rc.2.21480.5 1,603,241 10/12/2021
6.0.0-rc.1.21451.13 525,135 9/14/2021
6.0.0-preview.7.21377.19 727,022 8/10/2021
6.0.0-preview.6.21352.12 312,878 7/14/2021
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3.1.32 9,752,636 12/13/2022
3.1.31 2,687,328 11/8/2022
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3.1.17 6,386,272 7/13/2021
3.1.16 13,233,554 6/8/2021
3.1.15 7,636,549 5/11/2021
3.1.14 12,557,253 4/6/2021
3.1.13 12,528,099 3/9/2021
3.1.12 11,111,921 2/9/2021
3.1.11 17,809,794 1/12/2021
3.1.10 24,936,163 11/9/2020
3.1.9 67,285,459 10/13/2020
3.1.8 203,959,988 9/8/2020
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3.1.6 42,519,101 7/14/2020
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3.1.4 47,889,040 5/12/2020
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3.1.2 74,090,294 2/18/2020
3.1.1 40,486,929 1/14/2020
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3.1.0-preview3.19553.2 1,504,399 11/13/2019
3.1.0-preview2.19525.4 102,886 11/1/2019
3.1.0-preview1.19506.1 1,170,989 10/15/2019
3.0.3 103,507,303 2/18/2020
3.0.2 1,124,746 1/14/2020
3.0.1 6,351,006 11/18/2019
3.0.0 110,598,875 9/23/2019
3.0.0-rc1.19456.10 159,071 9/16/2019
3.0.0-preview9.19423.4 1,593,894 9/4/2019
3.0.0-preview8.19405.4 574,643 8/13/2019
3.0.0-preview7.19362.4 198,927 7/23/2019
3.0.0-preview6.19304.6 408,751 6/12/2019
3.0.0-preview5.19227.9 739,477 5/6/2019
3.0.0-preview4.19216.2 52,327 4/18/2019
3.0.0-preview3.19153.1 376,356 3/6/2019
3.0.0-preview.19074.2 172,376 1/29/2019
3.0.0-preview.18572.1 158,308 12/4/2018
2.2.0 442,982,444 12/3/2018
2.2.0-preview3-35497 525,652 10/17/2018
2.2.0-preview2-35157 526,921 9/12/2018
2.2.0-preview1-35029 231,411 8/22/2018
2.1.1 341,312,371 6/18/2018
2.1.0 391,783,735 5/29/2018
2.1.0-rc1-final 585,464 5/6/2018
2.1.0-preview2-final 734,146 4/10/2018
2.1.0-preview1-final 793,895 2/26/2018
2.0.2 32,871,931 5/7/2018
2.0.1 47,255,031 3/13/2018
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2.0.0-preview2-final 371,552 6/28/2017
2.0.0-preview1-final 1,110,799 5/10/2017
1.1.2 26,937,589 5/9/2017
1.1.1 41,358,058 3/6/2017
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1.0.2 119,030,250 3/6/2017
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