//配置信息的根对象
        public static IConfigurationRoot Configuration { get; set; }

 //以键值对的形式拼装将要填添加在JSon配置文件的配置信息
            var dic = new Dictionary<string, string>
            {
                {"Class", "配置信息"},
                {"Infor", "User"},
                {"User:0:Name", "xiaoming"},
                {"User:0:Age", "20"},
                {"User:1:Name", "xiao"},
                {"User:1:Age", "22"}
            };
            //创建配置信息读写的对象  基类  IConfigurationBuilder  用于创建配置信息的类
            var builder = new ConfigurationBuilder();
            //AddInMemoryCollection  配置的信息添加到 IConfigurationBuilder中 为其创建配置提供信息
            builder.AddInMemoryCollection(dic);
            //读写配置信息 以键值对的形式创建
            Configuration = builder.Build();

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    /// <summary>
    /// 
    /// </summary>
    public class AspNetCoreApiResultFilter 
    {
        /// <summary>
        ///  获取当前文件路径
        /// </summary>
        public static IHostingEnvironment Envs { get; set; }


        /// <summary>
        /// 重新构造
        /// </summary>
        /// <param name="context"></param>
        public AspNetCoreApiResultFilter( IHostingEnvironment environment)
        {
            Envs = environment;
        }
        /// <summary>
        /// 获取配置信息
        /// </summary>
        /// <param name="ConfigurationKey">JsonKey</param>
        /// <returns></returns>
        public static string Configuration(string ConfigurationKey)
        {
            var BuilderAppStting = new ConfigurationBuilder().SetBasePath(Envs.ContentRootPath).AddJsonFile("appsettings.json");
            var configuration = BuilderAppStting.Build();
            return configuration[ConfigurationKey];
        }
   }

.SetBasePath(Envs.ContentRootPath).AddJsonFile("appsettings.json") 代表着在基础路径上找到配置文件的信息