Opinion on the code i've written

using Newtonsoft.Json;

namespace TeleSaini.Config
{
    class JsonConfig
    {
        public string BotToken { get; set; }
        public string BotPrefix { get; set; }
        public string DbUser { get; set; }
        public string DbPassword { get; set; }
        public long HomeserverGuildId { get; set; }
    }

    public class TeleConfig
    {
        private const string TELECONFIG_PATH = "config.json";
        private string fileContents;
        private JsonConfig settings;

        private TeleConfig()
        {
            CheckDirectories(); // if the config file does not exist, don't even bother.
            ReadAll();
        }

        public static TeleConfig GetInstance()
        {
            return new TeleConfig();
        }

        private void CheckDirectories()
        {
            if (!File.Exists(TELECONFIG_PATH))
            {
                Console.WriteLine("Config.json does NOT exist. Please create one based off the sample provided.");
                Console.ReadKey();
                Environment.Exit(1);
            }

            Console.WriteLine("Config.json exists! Hurray!");
        }

        private void ReadAll()
        {
            fileContents = File.ReadAllText(TELECONFIG_PATH);
            settings = JsonConvert.DeserializeObject<JsonConfig>(fileContents);
        }

        public string BotToken { get => settings.BotToken; }
        public string BotPrefix { get => settings.BotPrefix; }
        public string DbUser { get => settings.DbUser; }
        public string DbPassword { get => settings.DbPassword; }
        public long HomeserverGuildId { get => settings.HomeserverGuildId; }
    }

}

using Newtonsoft.Json;

namespace TeleSaini.Config
{
    class JsonConfig
    {
        public string BotToken { get; set; }
        public string BotPrefix { get; set; }
        public string DbUser { get; set; }
        public string DbPassword { get; set; }
        public long HomeserverGuildId { get; set; }
    }

    public class TeleConfig
    {
        private const string TELECONFIG_PATH = "config.json";
        private string fileContents;
        private JsonConfig settings;

        private TeleConfig()
        {
            CheckDirectories(); // if the config file does not exist, don't even bother.
            ReadAll();
        }

        public static TeleConfig GetInstance()
        {
            return new TeleConfig();
        }

        private void CheckDirectories()
        {
            if (!File.Exists(TELECONFIG_PATH))
            {
                Console.WriteLine("Config.json does NOT exist. Please create one based off the sample provided.");
                Console.ReadKey();
                Environment.Exit(1);
            }

            Console.WriteLine("Config.json exists! Hurray!");
        }

        private void ReadAll()
        {
            fileContents = File.ReadAllText(TELECONFIG_PATH);
            settings = JsonConvert.DeserializeObject<JsonConfig>(fileContents);
        }

        public string BotToken { get => settings.BotToken; }
        public string BotPrefix { get => settings.BotPrefix; }
        public string DbUser { get => settings.DbUser; }
        public string DbPassword { get => settings.DbPassword; }
        public long HomeserverGuildId { get => settings.HomeserverGuildId; }
    }

}