FurnaceELK/Furnace/FurnaceUI/Config/AppSettingsHelper.cs

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FurnaceUI.Config
{
   public class AppSettingsHelper
    {
        public static string GetConfigValue(string key)
        {
            try
            {
                return ConfigurationManager.AppSettings[key].ToString();
            }
            catch
            {
                return null;
            }
        }

        public static bool SetConfigValue(string key, string value)
        {
            try
            {
                Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
                if (config.AppSettings.Settings[key] != null)
                    config.AppSettings.Settings[key].Value = value;
                else
                    config.AppSettings.Settings.Add(key, value);
                config.Save(ConfigurationSaveMode.Modified);
                ConfigurationManager.RefreshSection("appSettings");
                return true;
            }
            catch
            {
                return false;
            }
        }

    }
}