GreetingCommandHandler.cs

internal class GreetingCommandHandler : RequestHandler<GreetingCommand>
{
    [UseCommandSourcing(step: 1, timing: HandlerTiming.Before)]
    public override GreetingCommand Handle(GreetingCommand command)
    {
        Console.WriteLine("Hello {0}", command.Name);
        return base.Handle(command);
    }
}