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Migrate from Microsoft.Extensions.Logging 2.1 to 2.2 or 3.0

This article outlines the common steps for migrating a non-ASP.NET Core application that uses Microsoft.Extensions.Logging from 2.1 to 2.2 or 3.0.

2.1 to 2.2

Manually create ServiceCollection and call AddLogging.

2.1 example:

using (var loggerFactory = new LoggerFactory())
{
    loggerFactory.AddConsole();

    // use loggerFactory
}

2.2 example:

var serviceCollection = new ServiceCollection();
serviceCollection.AddLogging(builder => builder.AddConsole());

using (var serviceProvider = serviceCollection.BuildServiceProvider())
using (var loggerFactory = serviceProvider.GetService<ILoggerFactory>())
{
    // use loggerFactory
}

2.1 to 3.0

In 3.0, use LoggingFactory.Create.

2.1 example:

using (var loggerFactory = new LoggerFactory())
{
    loggerFactory.AddConsole();

    // use loggerFactory
}

3.0 example:

using (var loggerFactory = LoggerFactory.Create(builder => builder.AddConsole()))
{
    // use loggerFactory
}

Additional resources