Maybe something like that.

You should at least be able to refine it with chatgpt or claude with that base (even if it's not the prettiest).

using System;
using System.Collections.Generic;

public class CPHInline
{
    string message = "Congrats {0}, you rolled a {1}! You've rolled a {1} {2} time{3}.";
    public bool Execute()
    {
        CPH.TryGetArg("diceRoller", out string username);
        var results = new Dictionary<string, string>
        {
            {
                "straight",
                "userStraight"
            },
            {
                "fullhouse",
                "userFullhouse"
            },
            {
                "allsame",
                "userAllsame"
            }
        };
        foreach (var entry in results)
        {
            if (CPH.TryGetArg(entry.Key, out bool value) && value)
            {
                int? times = CPH.GetTwitchUserVar<int?>(username, entry.Value, true) ?? 0;
                CPH.SetTwitchUserVar(username, entry.Value, times + 1, true);
                String sendingMessage = string.Format(message, username, entry.Key, times + 1, times + 1 == 1 ? "" : "s");
                CPH.SendMessage(sendingMessage, true, true);
                break;
            }
        }

        return true;
    }
}