Microsoft.Extensions.Logging 10.0.0-rc.2.25502.107

About

Microsoft.Extensions.Logging is combined with a core logging abstraction under Microsoft.Extensions.Logging.Abstractions. This abstraction is available in our basic built-in implementations like console, event log, and debug (Debug.WriteLine) logging.

Key Features

  • Provide concrete implementations of ILoggerFactory
  • Provide extension methods for service collections, logger builder, and activity tracking
  • Provide logging filtering extension methods for logger builder

How to Use

Prior to .NET 6, we only had two forms possible for doing logging, using Microsoft.Extensions.Logging:

public class LoggingSample1
{
    private ILogger _logger;

    public LoggingSample1(ILogger logger)
    {
        _logger = logger;
    }

    public void LogMethod(string name)
    {
        _logger.LogInformation("Hello {name}", name);
    }
}

Here are some problems with the LoggingSample1 sample using LogInformation, LogWarning, etc.:

  1. We can provide event ID through these APIs, but they are not required today. Which leads to bad usages in real systems that want to react or detect specific event issues being logged.
  2. Parameters passed are processed before LogLevel checks; this leads to unnecessary code paths getting triggered even when logging is disabled for a log level.
  3. It requires parsing of message string on every use to find templates to substitute.

Because of these problems, the more efficient runtime approach recommended as best practices is to use LoggerMessage.Define APIs instead, illustrated below with LoggingSample2:

public class LoggingSample2
{
    private ILogger _logger;

    public LoggingSample2(ILogger logger)
    {
        _logger = logger;
    }

    public void LogMethod(string name)
    {
        Log.LogName(_logger, name);
    }

    private static class Log
    {
        private static readonly Action<ILogger, string, Exception> _logName = LoggerMessage.Define<string>(LogLevel.Information, 0, @"Hello {name}");

        public static void LogName(ILogger logger, string name)
        {
            _logName(logger, name, null!);
        }
    }
}

To reach a balance between performance and usability we added the compile-time logging source generator feature in .NET 6, to learn more about it and learn how to use a source generator to create log messages check out this documentation.


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);
}

Baggage and Tags for ActivityTrackingOptions

.NET 5.0 exposed a new feature that allows configuring the logger builder with the ActivityTrackingOption to add the tracing context Span Id, Trace Id, Parent Id, Trace state, and Trace flags to the logging scope. The tracing context usually carried in Activity.Current.

.NET 6.0 Preview 1 extended this feature to include more tracing context properties which are the Baggage and the Tags:

  var loggerFactory = LoggerFactory.Create(logging =>
  {
      logging.Configure(options =>
      {
          options.ActivityTrackingOptions = ActivityTrackingOptions.Tags | ActivityTrackingOptions.Baggage;
      }).AddSimpleConsole(options =>
      {
          options.IncludeScopes = true;
      });
  });

Main Types

The main types provided by this library are:

  • LoggingServiceCollectionExtensions
  • LoggerFactory
  • LoggerFactoryOptions
  • LoggingBuilderExtensions
  • ActivityTrackingOptions
  • FilterLoggingBuilderExtensions

Additional Documentation

Microsoft.Extensions.Logging.Abstractions 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 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 Microsoft.Extensions.Logging.

Packages Downloads
Microsoft.AspNetCore.Hosting
ASP.NET Core hosting infrastructure and startup logic for web applications.
 1,031
Microsoft.EntityFrameworkCore
Entity Framework Core is a lightweight and extensible version of the popular Entity Framework data access technology. Commonly Used Types: Microsoft.EntityFrameworkCore.DbContext Microsoft.EntityFrameworkCore.DbSet
 301
Microsoft.EntityFrameworkCore
Entity Framework Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations. EF Core works with SQL Server, Azure SQL Database, SQLite, Azure Cosmos DB, MySQL, PostgreSQL, and other databases through a provider plugin API. Commonly Used Types: Microsoft.EntityFrameworkCore.DbContext Microsoft.EntityFrameworkCore.DbSet
 193
Microsoft.EntityFrameworkCore
Entity Framework Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations. EF Core works with SQL Server, Azure SQL Database, SQLite, Azure Cosmos DB, MySQL, PostgreSQL, and other databases through a provider plugin API. Commonly Used Types: Microsoft.EntityFrameworkCore.DbContext Microsoft.EntityFrameworkCore.DbSet
 198
Microsoft.EntityFrameworkCore
Entity Framework Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations. EF Core works with SQL Server, Azure SQL Database, SQLite, Azure Cosmos DB, MySQL, PostgreSQL, and other databases through a provider plugin API. Commonly Used Types: Microsoft.EntityFrameworkCore.DbContext Microsoft.EntityFrameworkCore.DbSet
 292
Microsoft.EntityFrameworkCore
Entity Framework Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations. EF Core works with SQL Server, Azure SQL Database, SQLite, Azure Cosmos DB, MySQL, PostgreSQL, and other databases through a provider plugin API. Commonly Used Types: Microsoft.EntityFrameworkCore.DbContext Microsoft.EntityFrameworkCore.DbSet
 569
Microsoft.Extensions.Identity.Core
ASP.NET Core Identity is the membership system for building ASP.NET Core web applications, including membership, login, and user data. ASP.NET Core Identity allows you to add login features to your application and makes it easy to customize data about the logged in user. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/b92c9f50f0333ea661785ba849f303cde6a93844
 188
Microsoft.Extensions.Identity.Stores
ASP.NET Core Identity is the membership system for building ASP.NET Core web applications, including membership, login, and user data. ASP.NET Core Identity allows you to add login features to your application and makes it easy to customize data about the logged in user. This package was built from the source code at https://github.com/dotnet/aspnetcore/tree/b92c9f50f0333ea661785ba849f303cde6a93844
 182
Microsoft.Extensions.Logging.ApplicationInsights
Application Insights ILogger allows forwarding events from ILogger to Application Insights. Application Insights will collect your logs from multiple sources and provide rich powerful search capabilities. Privacy statement: https://go.microsoft.com/fwlink/?LinkId=512156
 208
Microsoft.Extensions.Logging.ApplicationInsights
Application Insights ILogger allows forwarding events from ILogger to Application Insights. Application Insights will collect your logs from multiple sources and provide rich powerful search capabilities. Privacy statement: https://go.microsoft.com/fwlink/?LinkId=512156
 238
Microsoft.Extensions.Logging.ApplicationInsights
Application Insights ILogger allows forwarding events from ILogger to Application Insights. Application Insights will collect your logs from multiple sources and provide rich powerful search capabilities. Privacy statement: https://go.microsoft.com/fwlink/?LinkId=512156
 247
Microsoft.Extensions.Logging.ApplicationInsights
Application Insights ILogger allows forwarding events from ILogger to Application Insights. Application Insights will collect your logs from multiple sources and provide rich powerful search capabilities. Privacy statement: https://go.microsoft.com/fwlink/?LinkId=512156
 289
Microsoft.Extensions.Logging.ApplicationInsights
Application Insights ILogger allows forwarding events from ILogger to Application Insights. Application Insights will collect your logs from multiple sources and provide rich powerful search capabilities. Privacy statement: https://go.microsoft.com/fwlink/?LinkId=512156
 424
Microsoft.Extensions.Logging.Configuration
Configuration support for Microsoft.Extensions.Logging.
 253
Microsoft.Extensions.Logging.Console
Console logger provider implementation for Microsoft.Extensions.Logging.
 260
Serilog.AspNetCore
Serilog support for ASP.NET Core logging
 178
Serilog.AspNetCore
Serilog support for ASP.NET Core logging
 466
Serilog.AspNetCore
Serilog support for ASP.NET Core logging
 518
Serilog.Extensions.Logging
Low-level Serilog provider for Microsoft.Extensions.Logging
 299
Serilog.Extensions.Logging
Low-level Serilog provider for Microsoft.Extensions.Logging
 967

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

.NET Framework 4.6.2

.NET Standard 2.1

.NET Standard 2.0

.NET 10.0

.NET 9.0

.NET 8.0

Version Downloads Last updated
10.0.0-rc.2.25502.107 3 10/16/2025
10.0.0-rc.1.25451.107 1 09/18/2025
10.0.0-preview.7.25380.108 5 08/12/2025
10.0.0-preview.6.25358.103 16 07/22/2025
10.0.0-preview.5.25277.114 7 06/08/2025
10.0.0-preview.4.25258.110 10 05/15/2025
10.0.0-preview.3.25171.5 13 04/13/2025
10.0.0-preview.2.25163.2 11 03/26/2025
10.0.0-preview.1.25080.5 13 03/03/2025
9.0.10 2 10/16/2025
9.0.9 3 09/19/2025
9.0.8 5 08/11/2025
9.0.7 6 07/18/2025
9.0.6 10 06/12/2025
9.0.5 11 05/15/2025
9.0.4 15 04/12/2025
9.0.3 16 03/14/2025
9.0.2 18 02/22/2025
9.0.1 16 01/18/2025
9.0.0 22 11/14/2024
9.0.0-rc.2.24473.5 16 10/08/2024
9.0.0-rc.1.24431.7 16 09/11/2024
9.0.0-preview.7.24405.7 18 08/22/2024
9.0.0-preview.6.24327.7 17 07/11/2024
9.0.0-preview.5.24306.7 19 06/23/2024
9.0.0-preview.4.24266.19 22 05/28/2024
9.0.0-preview.3.24172.9 18 05/16/2024
9.0.0-preview.2.24128.5 21 03/12/2024
9.0.0-preview.1.24080.9 22 03/08/2024
8.0.1 18 10/08/2024
8.0.0 29 01/21/2024
8.0.0-rc.2.23479.6 22 12/28/2023
8.0.0-rc.1.23419.4 18 02/07/2024
8.0.0-preview.7.23375.6 24 02/07/2024
8.0.0-preview.6.23329.7 23 02/07/2024
8.0.0-preview.5.23280.8 25 02/07/2024
8.0.0-preview.4.23259.5 19 02/07/2024
8.0.0-preview.3.23174.8 21 02/07/2024
8.0.0-preview.2.23128.3 22 02/07/2024
8.0.0-preview.1.23110.8 26 12/12/2023
7.0.0 28 12/06/2022
7.0.0-rc.2.22472.3 24 02/07/2024
7.0.0-rc.1.22426.10 21 01/05/2024
7.0.0-preview.7.22375.6 23 02/07/2024
7.0.0-preview.6.22324.4 25 02/07/2024
7.0.0-preview.5.22301.12 23 02/07/2024
7.0.0-preview.4.22229.4 27 02/07/2024
7.0.0-preview.3.22175.4 24 02/07/2024
7.0.0-preview.2.22152.2 28 12/24/2023
7.0.0-preview.1.22076.8 24 12/24/2023
6.0.2-mauipre.1.22102.15 24 02/07/2024
6.0.2-mauipre.1.22054.8 24 02/07/2024
6.0.1 17 11/14/2024
6.0.0 588 11/19/2021
6.0.0-rc.2.21480.5 26 02/07/2024
6.0.0-rc.1.21451.13 24 02/07/2024
6.0.0-preview.7.21377.19 28 04/01/2022
6.0.0-preview.6.21352.12 24 02/07/2024
6.0.0-preview.5.21301.5 22 02/07/2024
6.0.0-preview.4.21253.7 23 02/07/2024
6.0.0-preview.3.21201.4 23 12/22/2023
6.0.0-preview.2.21154.6 22 02/07/2024
6.0.0-preview.1.21102.12 22 02/07/2024
5.0.0 2,267 11/10/2020
5.0.0-rc.2.20475.5 23 02/03/2024
5.0.0-rc.1.20451.14 25 12/10/2023
5.0.0-preview.8.20407.11 21 02/07/2024
5.0.0-preview.7.20364.11 25 02/07/2024
5.0.0-preview.6.20305.6 20 02/07/2024
5.0.0-preview.5.20278.1 27 02/07/2024
5.0.0-preview.4.20251.6 23 02/07/2024
5.0.0-preview.3.20215.2 22 02/07/2024
5.0.0-preview.2.20160.3 39 02/07/2024
5.0.0-preview.1.20120.4 23 02/07/2024
3.1.32 23 12/18/2023
3.1.31 25 12/07/2023
3.1.30 19 02/07/2024
3.1.29 30 01/16/2024
3.1.28 24 12/21/2023
3.1.27 22 12/16/2023
3.1.26 24 02/07/2024
3.1.25 19 02/07/2024
3.1.24 21 12/05/2023
3.1.23 21 02/07/2024
3.1.22 78 12/14/2021
3.1.21 21 02/07/2024
3.1.20 29 12/19/2023
3.1.19 25 01/04/2022
3.1.18 81 12/14/2021
3.1.17 37 07/13/2021
3.1.16 23 06/08/2021
3.1.15 26 05/11/2021
3.1.14 27 04/06/2021
3.1.13 70 03/09/2021
3.1.12 80 02/09/2021
3.1.11 30 01/25/2021
3.1.10 28 11/10/2020
3.1.9 171 10/25/2020
3.1.8 413 09/11/2020
3.1.7 30 08/24/2020
3.1.6 310 08/04/2020
3.1.5 35 06/21/2020
3.1.4 27 02/07/2024
3.1.3 30 03/28/2020
3.1.2 768 02/27/2020
3.1.1 26 02/10/2020
3.1.0 284 02/10/2020
3.1.0-preview3.19553.2 20 03/08/2024
3.1.0-preview2.19525.4 22 03/08/2024
3.1.0-preview1.19506.1 24 06/23/2021
3.0.3 31 01/23/2021
3.0.2 30 02/07/2024
3.0.1 35 11/08/2023
3.0.0 82 06/21/2020
3.0.0-rc1.19456.10 24 02/07/2024
3.0.0-preview9.19423.4 23 03/08/2024
3.0.0-preview8.19405.4 20 03/08/2024
3.0.0-preview7.19362.4 22 03/08/2024
3.0.0-preview6.19304.6 25 02/07/2024
3.0.0-preview5.19227.9 24 03/08/2024
3.0.0-preview4.19216.2 25 03/08/2024
3.0.0-preview3.19153.1 24 02/07/2024
3.0.0-preview.19074.2 21 02/07/2024
3.0.0-preview.18572.1 22 02/07/2024
2.2.0 74 03/12/2020
2.2.0-preview3-35497 24 02/07/2024
2.2.0-preview2-35157 18 02/07/2024
2.2.0-preview1-35029 25 02/07/2024
2.1.1 3,427 07/05/2020
2.1.0 1,203 02/11/2020
2.1.0-rc1-final 27 12/27/2023
2.1.0-preview2-final 23 12/26/2023
2.1.0-preview1-final 28 12/30/2023
2.0.2 25 02/07/2024
2.0.1 23 02/07/2024
2.0.0 235 02/10/2020
2.0.0-preview2-final 23 12/03/2023
2.0.0-preview1-final 29 12/04/2023
1.1.2 29 02/10/2020
1.1.1 29 02/19/2020
1.1.0 32 02/07/2024
1.1.0-preview1-final 27 12/04/2023
1.0.2 123 02/11/2020
1.0.1 26 12/24/2023
1.0.0 31 02/19/2020
1.0.0-rc2-final 29 12/12/2023
1.0.0-rc1-final 22 12/12/2023