Microsoft.Extensions.Logging 9.0.0-preview.6.24327.7

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.:

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.
Parameters passed are processed before LogLevel checks; this leads to unnecessary code paths getting triggered even when logging is disabled for a log level.
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.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	3,739
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	9,822
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	2,627
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	3,646
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	4,528
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	5,675
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	8,595
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	9,701
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	10,327
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	13,841
Microsoft.Extensions.Http The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. The HttpClient factory provides extensibility to plug in DelegatingHandlers that address cross-cutting concerns such as service location, load balancing, and reliability. The default HttpClient factory provides built-in diagnostics and logging and manages the lifetimes of connections in a performant way. Commonly used types: System.Net.Http.IHttpClientFactory	9,797
Microsoft.Extensions.Http The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. The HttpClient factory provides extensibility to plug in DelegatingHandlers that address cross-cutting concerns such as service location, load balancing, and reliability. The default HttpClient factory provides built-in diagnostics and logging and manages the lifetimes of connections in a performant way. Commonly used types: System.Net.Http.IHttpClientFactory	9,826
Microsoft.Extensions.Http The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. The HttpClient factory provides extensibility to plug in DelegatingHandlers that address cross-cutting concerns such as service location, load balancing, and reliability. The default HttpClient factory provides built-in diagnostics and logging and manages the lifetimes of connections in a performant way. Commonly Used Types: System.Net.Http.IHttpClientFactory	23,951
Microsoft.Extensions.Http The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way. The HttpClient factory provides extensibility to plug in DelegatingHandlers that address cross-cutting concerns such as service location, load balancing, and reliability. The default HttpClient factory provides built-in diagnostics and logging and manages the lifetimes of connections in a performant way. Commonly Used Types: System.Net.Http.IHttpClientFactory When using NuGet 3.x this package requires at least version 3.4.	9,736
OpenTracing.Contrib.NetCore Adds OpenTracing instrumentation for .NET Core apps that use the `Microsoft.Extensions.*` stack. Instrumented components: HttpClient calls, ASP.NET Core, Entity Framework Core and any other library that uses DiagnosticSource events.	9,813
Serilog.AspNetCore Serilog support for ASP.NET Core logging	3,075
Serilog.AspNetCore Serilog support for ASP.NET Core logging	10,549
Serilog.AspNetCore Serilog support for ASP.NET Core logging	13,596
Serilog.Extensions.Logging Low-level Serilog provider for Microsoft.Extensions.Logging	10,593
Serilog.Extensions.Logging Low-level Serilog provider for Microsoft.Extensions.Logging	14,425

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Version	Downloads	Last updated
9.0.0-rc.1.24431.7	3	09/13/2024
9.0.0-preview.7.24405.7	6	08/14/2024
9.0.0-preview.6.24327.7	5	07/12/2024
9.0.0-preview.5.24306.7	4	06/21/2024
9.0.0-preview.4.24266.19	9	05/22/2024
9.0.0-preview.3.24172.9	7	04/20/2024
9.0.0-preview.2.24128.5	7	03/15/2024
9.0.0-preview.1.24080.9	9	02/19/2024
8.0.0	13	11/19/2023
8.0.0-rc.2.23479.6	17	10/10/2023
8.0.0-rc.1.23419.4	32	09/26/2023
8.0.0-preview.7.23375.6	16	08/25/2023
8.0.0-preview.6.23329.7	12	07/11/2023
8.0.0-preview.5.23280.8	14	06/13/2023
8.0.0-preview.4.23259.5	22	05/19/2023
8.0.0-preview.3.23174.8	19	06/21/2023
8.0.0-preview.2.23128.3	11	04/02/2023
8.0.0-preview.1.23110.8	11	04/02/2023
7.0.0	4,212	11/15/2022
7.0.0-rc.2.22472.3	14	10/12/2022
7.0.0-rc.1.22426.10	15	09/22/2022
7.0.0-preview.7.22375.6	12	09/23/2022
7.0.0-preview.6.22324.4	20	09/21/2022
7.0.0-preview.5.22301.12	20	09/21/2022
7.0.0-preview.4.22229.4	23	06/27/2022
7.0.0-preview.3.22175.4	20	06/27/2022
7.0.0-preview.2.22152.2	18	07/09/2022
7.0.0-preview.1.22076.8	23	09/23/2022
6.0.2-mauipre.1.22102.15	13	09/24/2022
6.0.2-mauipre.1.22054.8	16	09/21/2022
6.0.0	25,713	06/27/2022
6.0.0-rc.2.21480.5	9	09/14/2023
6.0.0-rc.1.21451.13	12	06/27/2022
6.0.0-preview.7.21377.19	16	07/05/2022
6.0.0-preview.6.21352.12	17	06/27/2022
6.0.0-preview.5.21301.5	22	09/23/2022
6.0.0-preview.4.21253.7	18	07/05/2022
6.0.0-preview.3.21201.4	14	06/27/2022
6.0.0-preview.2.21154.6	16	06/27/2022
6.0.0-preview.1.21102.12	18	06/27/2022
5.0.0	24,902	06/27/2022
5.0.0-rc.2.20475.5	10	09/24/2022
5.0.0-rc.1.20451.14	9	09/22/2022
5.0.0-preview.8.20407.11	9	06/27/2022
5.0.0-preview.7.20364.11	16	06/27/2022
5.0.0-preview.6.20305.6	10	09/23/2022
5.0.0-preview.5.20278.1	14	09/21/2022
5.0.0-preview.4.20251.6	16	06/27/2022
5.0.0-preview.3.20215.2	14	06/27/2022
5.0.0-preview.2.20160.3	16	09/24/2022
5.0.0-preview.1.20120.4	19	09/21/2022
3.1.32	11	01/13/2023
3.1.31	11	12/10/2022
3.1.30	10	12/28/2022
3.1.29	18	09/22/2022
3.1.28	15	09/23/2022
3.1.27	14	09/24/2022
3.1.26	13	09/22/2022
3.1.25	11	09/22/2022
3.1.24	17	06/27/2022
3.1.23	16	06/27/2022
3.1.22	12	06/27/2022
3.1.21	25	07/01/2022
3.1.20	16	06/27/2022
3.1.19	10	09/22/2022
3.1.18	16	09/23/2022
3.1.17	14	09/22/2022
3.1.16	17	06/27/2022
3.1.15	16	07/19/2022
3.1.14	17	06/27/2022
3.1.13	13	09/23/2022
3.1.12	14	06/27/2022
3.1.11	14	06/27/2022
3.1.10	14	06/27/2022
3.1.9	18	06/27/2022
3.1.8	23	06/27/2022
3.1.7	15	06/27/2022
3.1.6	16	09/22/2022
3.1.5	9,827	06/27/2022
3.1.4	11	09/22/2022
3.1.3	9,795	06/27/2022
3.1.2	18	07/01/2022
3.1.1	16	06/27/2022
3.1.0	261	09/22/2022
3.1.0-preview3.19553.2	20	07/01/2022
3.1.0-preview2.19525.4	18	09/23/2022
3.1.0-preview1.19506.1	15	09/22/2022
3.0.3	19	08/31/2022
3.0.2	15	09/23/2022
3.0.1	15	07/21/2022
3.0.0	10	09/24/2022
3.0.0-rc1.19456.10	10	09/23/2022
3.0.0-preview9.19423.4	16	07/05/2022
3.0.0-preview8.19405.4	17	07/05/2022
3.0.0-preview7.19362.4	10	06/29/2022
3.0.0-preview6.19304.6	17	07/05/2022
3.0.0-preview5.19227.9	21	07/03/2022
3.0.0-preview4.19216.2	11	09/23/2022
3.0.0-preview3.19153.1	11	09/26/2022
3.0.0-preview.19074.2	11	09/23/2022
3.0.0-preview.18572.1	16	09/25/2022
2.2.0	22	09/22/2022
2.2.0-preview3-35497	10	12/26/2022
2.2.0-preview2-35157	30	07/04/2022
2.2.0-preview1-35029	8	12/09/2022
2.1.1	13	06/29/2022
2.1.0	20	06/27/2022
2.1.0-rc1-final	13	07/05/2022
2.1.0-preview2-final	14	09/25/2022
2.1.0-preview1-final	14	09/22/2022
2.0.2	13	02/04/2023
2.0.1	14	12/12/2022
2.0.0	9,819	06/27/2022
2.0.0-preview2-final	26	06/29/2022
2.0.0-preview1-final	12	09/24/2022
1.1.2	14	09/23/2022
1.1.1	13	09/25/2022
1.1.0	3,738	06/27/2022
1.1.0-preview1-final	12	09/22/2022
1.0.2	12	09/22/2022
1.0.1	18	12/17/2022
1.0.0	14	09/22/2022
1.0.0-rc2-final	15	03/03/2023
1.0.0-rc1-final	11	07/12/2022

Microsoft.Extensions.Logging 9.0.0-preview.6.24327.7

Readme

About

Key Features

How to Use

Baggage and Tags for ActivityTrackingOptions

Main Types

Additional Documentation

Related Packages

Feedback & Contributing

Used By

Release Notes

Dependencies

.NET Framework 4.6.2

.NET Standard 2.1

.NET Standard 2.0

.NET 9.0

.NET 8.0

Versions

Baggage and Tags for `ActivityTrackingOptions`