Compile-time logging source generator

Compie-time logging source generators

.NET 6 introduced a new of defining how to log messages with source generators.

// The class has to be partial so we can extend the functionality
public partial class MyService
{
    private ILogger logger;

    public MyService(ILogger logger) => this.logger = logger;

    private void SomeActivity()
    {
        LogSomeActivity("Steven", "Giesel");
    }

    // The source generator will automatically find the "logger" private field and use it
    [LoggerMessage(Message = "Hello {lastName}, {firstName}", Level = LogLevel.Information)]
    private partial void LogSomeActivity(string firstName, string lastName);
}

It is also possible to have a static version, where the user passes in the ILogger.

public partial class MyService
{
    private ILogger logger;

    public MyService(ILogger logger) => this.logger = logger;


    // The source generator will automatically find the "logger" private field and use it
    [LoggerMessage(Message = "Hello {lastName}, {firstName}", Level = LogLevel.Information)]
    public static partial void LogSomeActivity(ILogger logger, string firstName, string lastName);
}

💡 Info: A detailed explanation can be found here.