.net core从配置中读取数据并实例对象

public static void Init(IServiceCollection services, IConfiguration configuration){
     Configuration = configuration;
     services.Configure<Connection>(configuration.GetSection("Connection"));


     _connection = provider.GetRequiredService<IOptions<Connection>>().Value;      
}

public static string GetSettingString(string key)
        {
            return Configuration[key];
        }

public static IConfigurationSection GetSection(string key)
        {
            return Configuration.GetSection(key);
        }