（六）.NET6.0通用读取配置文件功能

using Microsoft.Extensions.Configuration;

namespace Ysq.Core.AppSettings
{
    public class AppHelper
    {
        private IConfiguration _config;

        // 静态单例实例
        private static AppHelper _instance;

        // 私有构造函数，防止外部直接实例化
        private AppHelper(IConfiguration configuration)
        {
            _config = configuration;
        }

        /// <summary>
        /// 初始化 AppHelper 单例实例
        /// </summary>
        /// <param name="configuration"></param>
        public static void Init(IConfiguration configuration)
        {
            if (_instance == null)
            {
                _instance = new AppHelper(configuration);
            }
        }

        /// <summary>
        /// 获取 AppHelper 单例实例
        /// </summary>
        public static AppHelper Instance
        {
            get
            {
                if (_instance == null)
                {
                    throw new InvalidOperationException("AppHelper 未初始化，请先调用 Init 方法进行初始化");
                }
                return _instance;
            }
        }

        /// <summary>
        /// 读取指定节点的字符串
        /// </summary>
        /// <param name="sessions"></param>
        /// <returns></returns>
        public string ReadAppSettings(params string[] sessions)
        {
            try
            {
                if (sessions.Any())
                {
                    return _config[string.Join(":", sessions)];
                }
            }
            catch
            {
                return "";
            }
            return "";
        }

        /// <summary>
        /// 读取实体信息
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="session"></param>
        /// <returns></returns>
        public List<T> ReadAppSettings<T>(params string[] session)
        {
            List<T> list = new List<T>();
            _config.Bind(string.Join(":", session), list);
            return list;
        }
    }
}