ASP.NET Core 源码阅读笔记(1) ---Microsoft.Extensions.DependencyInjection

在asp .net中使用依赖注入很简单，只需要在Startup类的ConfigureServices(IServiceCollection services)方法中，通过IServiceCollection接口注入就行。

通过接口的Add*方法进行注册，代码如下：

ASP.NET Core runtime帮忙注册如下方法

       // This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services)
        {
            services.AddEntityFrameworkSqlServer().AddDbContext<**Context>(options => options.UseSqlServer(Configuration.GetConnectionString("***")));

            //services.AddAuthorization(options => { options.DefaultPolicy });
            // Add framework services.
            services.AddOptions();
            services.AddDistributedMemoryCache();
            services.AddMvc();
            services.AddScoped<MenuService>();
            services.AddTransient<ICommon, Common>();
            services.AddSingleton<IConfiguration>(Configuration);
        }