tallybot-handleaddcommand.cs

private static Message CreateReplyMessage(Message message, string text)
{
    var reply = message.CreateReplyMessage(text);
    reply.BotUserData = message.BotUserData;

    return reply;
}

private Message HandleAddCommand(Command command, Message message)
{
    if (string.IsNullOrWhiteSpace(command.Parameters))
    {
        return CreateReplyMessage(message, "I need a category to keep tally for. Example: add exercise");
    }

    var category = command.Parameters.ToLowerInvariant();
    var tallies = message.GetBotUserData<Dictionary<string, int>>("tallies");
    
    if (tallies == null)
    {
        tallies = new Dictionary<string, int>();
    }

    int tally = 0;
    tallies.TryGetValue(category, out tally);

    tally += 1;
    tallies[category] = tally;

    var replyMessage = CreateReplyMessage(message, $"The tally for '{category}' has been updated to {tally}");

    // Set the new tally value to the reply message
    replyMessage.SetBotUserData("tallies", tallies);

    return replyMessage;
}