.容器化--实现自动依赖注入

一、首先添加一个容器扩展的类，用来程序集中加载类型并添加到容器中

    /// <summary>
    /// 容器扩展
    /// </summary>
    public static class ServiceCollectionExtensions
    {
        /// <summary>
        /// 从程序集中加载类型并添加到容器中
        /// </summary>
        /// <param name="services">容器</param>
        /// <param name="assemblies">程序集集合</param>
        /// <returns></returns>
        public static IServiceCollection AddServicesFromAssemblies(this IServiceCollection services, params string[] assemblies)
        {
            Type attributeType = typeof(ServiceDescriptionAttribute);
            //var refAssembyNames = Assembly.GetExecutingAssembly().GetReferencedAssemblies();
            foreach (var item in assemblies)
            {
                Assembly assembly = Assembly.Load(item);

                var types = assembly.GetTypes();

                foreach (var classType