CommandHandler.cs

private static async Task CommandExecutedAsync(Optional<CommandInfo> command, ICommandContext context,
            IResult result)
        {
            if (!command.IsSpecified) return;
            if (result.IsSuccess) return;


            if (result.ErrorReason == "The input text has too few parameters.")
                await context.Channel.SendMessageAsync(
                    $"***.{command.Value.Name}*** is missing parameters.  Use ***.help*** for more information.");
            else await context.Channel.SendMessageAsync($"{command.Value.Name}: {result.ErrorReason}");
        }