a config class c#

ConfigFile.cs

using System;
using System.Collections.Generic;
using System.Configuration;

namespace Yallr.src.game
{
    class ConfigFile
    {
        Configuration configManager = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
        KeyValueConfigurationCollection confCollection;
        List<QueryKeyValue> QueriedValues = new List<QueryKeyValue>();

        private class QueryKeyValue
        {
            public string Key { get; set; }
            public string Value { get; set; }

            public QueryKeyValue(string key, string value)
            {
                Key = key;
                Value = value;
            }
        }

        public ConfigFile()
        {
            confCollection = configManager.AppSettings.Settings;

            if (confCollection["player_name"] == null)
            {
                Random rnd = new Random();
                confCollection.Add(new KeyValueConfigurationElement("player_name",
                    "Yal#" + rnd.Next(10000, 99999)));
            }
            if (confCollection["logfile_name"] == null)
                confCollection.Add("logfile_name", "yallr_log.txt");
            if (confCollection["gfx_screen_width"] == null)
                confCollection.Add("gfx_screen_width", "1280");
            if (confCollection["gfx_screen_height"] == null)
                confCollection.Add("gfx_screen_height", "720");
            if (confCollection["gfx_fullscreen"] == null)
                confCollection.Add("gfx_fullscreen", "0");
            if (confCollection["gfx_borderless"] == null)
                confCollection.Add("gfx_borderless", "0");
            if (confCollection["gfx_vsync"] == null)
                confCollection.Add("gfx_vsync", "0");
            if (confCollection["cl_debug"] == null)
                confCollection.Add("cl_debug", "0");

            configManager.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection(configManager.AppSettings.SectionInformation.Name);
        }

        /// <summary>
        /// Gets the value of a setting
        /// </summary>
        /// <param name="key">The setting to get</param>
        /// <returns>The setting value</returns>
        public string Get(Constants.ConfigKeys key)
        {
            return confCollection[key.ToString()].Value;
        }

        /// <summary>
        /// Sets a setting by a given key to the value and saves it.
        /// </summary>
        /// <param name="key">The setting to change</param>
        /// <param name="value">The value to assign</param>
        public void Set(Constants.ConfigKeys key, string value)
        {
            confCollection[key.ToString()].Value = value;
            configManager.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection(configManager.AppSettings.SectionInformation.Name);
        }

        /// <summary>
        /// Queries a setting to be saved later
        /// </summary>
        /// <param name="key">The setting to change</param>
        /// <param name="value">The value to assign</param>
        public void QuerySave(Constants.ConfigKeys key, string value)
        {
            QueriedValues.Add(new QueryKeyValue(key.ToString(), value));
        }

        /// <summary>
        /// Save all the settings in the current query, and cleans it.
        /// </summary>
        public void SaveQ()
        {
            foreach(var k in QueriedValues)
            {
                confCollection[k.Key].Value = k.Value;
            }
            configManager.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection(configManager.AppSettings.SectionInformation.Name);
            QueriedValues.Clear();
        }
    }
}