Logging in .NET Core & .NET 5

Quick links

• Introduction to logging in ASP.NET Core
• Experiments on GitHub: devpro/dotnetcore-logging

Tips

• For a netstandard library

  • Add Microsoft.Extensions.Logging to the project (do not add a strong dependency to a logging framework such as log4net or NLog!).

    <Project Sdk="Microsoft.NET.Sdk">
      <PropertyGroup>
        <TargetFramework>netcoreapp2.0</TargetFramework>
      </PropertyGroup>
      <ItemGroup>
        <PackageReference Include="Microsoft.Extensions.Logging" Version="2.0.0" />
      </ItemGroup>
      <!-- ... -->
    </Project>

  • Add ILogger dependency (IoC) to the class constructor and the related private field

    using Microsoft.Extensions.Logging;
    // ...
    
    public class MyClass
    {
        private readonly ILogger _logger;
    
        public MyClass(ILogger<PuppetFacterService> logger)
        {
            _logger = logger;
        }
    
        public MyMethod()
        {
            _logger.LogInformation("MyMethod called");
        }
    }

Frameworks

Serilog

Homepage: serilog.net

Usecases

Logging in Redis

• Possible with Serilog
• NLog.Redis not yet available for .NET Core (as of the 10th of May 2018).