TextBoxStyler/TextBoxStyler/Commands.cs

using System;
using Dalamud.Game.Command;

namespace TextBoxStyler {
    public class Commands : IDisposable {
        private const string CommandName = "/textstyle";

        private Plugin Plugin { get; }

        internal Commands(Plugin plugin) {
            this.Plugin = plugin;

            this.Plugin.CommandManager.AddHandler(CommandName, new CommandInfo(this.OnCommand) {
                HelpMessage = $"Opens the settings for {Plugin.Name}",
            });
        }

        public void Dispose() {
            this.Plugin.CommandManager.RemoveHandler(CommandName);
        }

        private void OnCommand(string command, string args) {
            this.Plugin.Ui.ToggleConfig();
        }
    }
}