Azure Function Logging

An instance of ILogger is passed as an argument to the function invocation. You can use extension methods from Microsoft.Extensions.Logging to log events using the log instance.

run.csx

using System;

public static void Run(TimerInfo myTimer, ILogger log)
{
    log.LogInformation("Log Information");
    log.LogWarning("Log Warning");
    log.LogError("Log Error");
    log.LogDebug("Log Debug");
}

Sources:

https://www.serverlessnotes.com/docs/logging-with-ilogger-in-azure-functions