Microsoft.Extensions.Logging 9.0.0-preview.1.24080.9

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 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	37
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	43
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	49
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	50
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	53
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	55
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	57
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	61
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	75
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	81
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	104
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	98
Microsoft.Extensions.Logging.Configuration Configuration support for Microsoft.Extensions.Logging.	92
Serilog.AspNetCore Serilog support for ASP.NET Core logging	63
Serilog.AspNetCore Serilog support for ASP.NET Core logging	77
Serilog.AspNetCore Serilog support for ASP.NET Core logging	88
Serilog.AspNetCore Serilog support for ASP.NET Core logging	188
Serilog.AspNetCore.Plus Serilog support for ASP.NET Core logging with some plus features	67
Serilog.Extensions.Logging Low-level Serilog provider for Microsoft.Extensions.Logging	100
Serilog.Extensions.Logging Low-level Serilog provider for Microsoft.Extensions.Logging	110

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Version	Downloads	Last updated
9.0.0-rc.1.24431.7	1	09/19/2024
9.0.0-preview.7.24405.7	4	08/22/2024
9.0.0-preview.6.24327.7	22	07/18/2024
9.0.0-preview.5.24306.7	18	06/24/2024
9.0.0-preview.4.24266.19	27	07/19/2024
9.0.0-preview.3.24172.9	20	07/23/2024
9.0.0-preview.2.24128.5	18	07/18/2024
9.0.0-preview.1.24080.9	32	07/20/2024
8.0.0	105	02/04/2024
8.0.0-rc.2.23479.6	23	07/23/2024
8.0.0-rc.1.23419.4	25	07/23/2024
8.0.0-preview.7.23375.6	26	07/27/2024
8.0.0-preview.6.23329.7	26	07/23/2024
8.0.0-preview.5.23280.8	33	07/17/2024
8.0.0-preview.4.23259.5	21	07/23/2024
8.0.0-preview.3.23174.8	34	07/22/2024
8.0.0-preview.2.23128.3	26	07/23/2024
8.0.0-preview.1.23110.8	22	07/22/2024
7.0.0	93	02/04/2024
7.0.0-rc.2.22472.3	21	07/23/2024
7.0.0-rc.1.22426.10	17	07/23/2024
7.0.0-preview.7.22375.6	25	07/23/2024
7.0.0-preview.6.22324.4	17	07/23/2024
7.0.0-preview.5.22301.12	24	07/23/2024
7.0.0-preview.4.22229.4	16	07/23/2024
7.0.0-preview.3.22175.4	29	07/20/2024
7.0.0-preview.2.22152.2	23	07/23/2024
7.0.0-preview.1.22076.8	14	07/23/2024
6.0.0	115	02/04/2024
6.0.0-rc.2.21480.5	27	07/23/2024
6.0.0-rc.1.21451.13	20	07/23/2024
6.0.0-preview.7.21377.19	21	07/21/2024
6.0.0-preview.6.21352.12	20	07/23/2024
6.0.0-preview.5.21301.5	19	07/22/2024
6.0.0-preview.4.21253.7	28	07/23/2024
6.0.0-preview.3.21201.4	23	07/23/2024
6.0.0-preview.2.21154.6	21	07/23/2024
6.0.0-preview.1.21102.12	18	07/23/2024
5.0.0	122	02/04/2024
5.0.0-rc.2.20475.5	28	07/23/2024
5.0.0-rc.1.20451.14	32	07/23/2024
5.0.0-preview.8.20407.11	18	07/23/2024
5.0.0-preview.7.20364.11	20	07/23/2024
5.0.0-preview.6.20305.6	28	07/20/2024
5.0.0-preview.5.20278.1	29	07/18/2024
5.0.0-preview.4.20251.6	30	07/23/2024
5.0.0-preview.3.20215.2	22	07/21/2024
5.0.0-preview.2.20160.3	18	07/23/2024
5.0.0-preview.1.20120.4	19	07/23/2024
3.1.32	27	07/23/2024
3.1.31	17	07/23/2024
3.1.30	25	07/23/2024
3.1.29	21	07/23/2024
3.1.28	16	07/23/2024
3.1.27	26	07/23/2024
3.1.26	27	07/23/2024
3.1.25	25	07/17/2024
3.1.24	23	07/23/2024
3.1.23	28	07/23/2024
3.1.22	20	07/23/2024
3.1.21	22	07/23/2024
3.1.20	23	07/18/2024
3.1.19	15	07/23/2024
3.1.18	26	07/23/2024
3.1.17	18	07/23/2024
3.1.16	22	07/23/2024
3.1.15	28	07/20/2024
3.1.14	19	07/23/2024
3.1.13	21	07/23/2024
3.1.12	21	07/23/2024
3.1.11	24	07/23/2024
3.1.10	23	07/23/2024
3.1.9	20	07/23/2024
3.1.8	23	07/23/2024
3.1.7	20	07/23/2024
3.1.6	24	07/22/2024
3.1.5	35	07/17/2024
3.1.4	29	07/23/2024
3.1.3	21	07/23/2024
3.1.2	19	07/23/2024
3.1.1	17	07/23/2024
3.1.0	30	07/23/2024
3.1.0-preview3.19553.2	26	07/23/2024
3.1.0-preview2.19525.4	17	07/23/2024
3.1.0-preview1.19506.1	25	07/23/2024
3.0.3	15	07/23/2024
3.0.2	30	07/17/2024
3.0.1	22	07/23/2024
3.0.0	19	07/23/2024
3.0.0-rc1.19456.10	15	07/23/2024
3.0.0-preview9.19423.4	21	07/23/2024
3.0.0-preview8.19405.4	22	07/18/2024
3.0.0-preview7.19362.4	12	07/23/2024
3.0.0-preview6.19304.6	29	07/23/2024
3.0.0-preview5.19227.9	20	07/23/2024
3.0.0-preview4.19216.2	18	07/24/2024
3.0.0-preview3.19153.1	22	07/18/2024
3.0.0-preview.19074.2	29	07/18/2024
3.0.0-preview.18572.1	24	07/23/2024
2.2.0	20	07/19/2024
2.2.0-preview3-35497	19	07/23/2024
2.2.0-preview2-35157	17	07/23/2024
2.2.0-preview1-35029	25	07/23/2024
2.1.1	27	07/21/2024
2.1.0	18	07/23/2024
2.1.0-rc1-final	19	07/22/2024
2.1.0-preview2-final	24	07/23/2024
2.1.0-preview1-final	20	07/18/2024
2.0.2	24	07/23/2024
2.0.1	29	02/19/2024
2.0.0	21	07/22/2024
2.0.0-preview2-final	18	07/23/2024
2.0.0-preview1-final	27	07/20/2024
1.1.2	18	07/23/2024
1.1.1	28	07/23/2024
1.1.0	17	07/23/2024
1.1.0-preview1-final	30	07/23/2024
1.0.2	23	07/20/2024
1.0.1	22	07/18/2024
1.0.0	18	07/24/2024
1.0.0-rc2-final	23	07/23/2024
1.0.0-rc1-final	31	07/23/2024

Microsoft.Extensions.Logging 9.0.0-preview.1.24080.9

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`