SiteCronBase.cs

using Quartz;
using Sitecron.SitecronSettings;

public abstract class SiteCronBase : IJob
{
    private DateTime _lastLogEntry;
    protected abstract void Run(IJobExecutionContext args);

    public void Execute(IJobExecutionContext context)
    {
        var startExecution = DateTime.Now;
        _lastLogEntry = DateTime.Now;
        Run(context);
        _lastLogEntry = startExecution;
        WriteLogLine(context, "Job completed in elapsed time shown.");
    }

    protected void WriteLogLine(IJobExecutionContext context, string value)
    {
        var log = context.JobDetail.JobDataMap.GetString(SitecronConstants.ParamNames.SitecronJobLogData);

        var line = $"{DateTime.Now.ToUniversalTime()} - - {value}, Elapsed time since last step: {(DateTime.Now - _lastLogEntry).TotalSeconds} seconds";
        Log.Info(line, this);
        log = log + "\r\n" + line;

        context.JobDetail.JobDataMap.Put(SitecronConstants.ParamNames.SitecronJobLogData, log);
        _lastLogEntry = DateTime.Now;
    }
}